{"product_id":"ll-37-ultimate-research-grade-peptide","title":"LL-37 - Ultimate - Research Grade Peptide","description":"\u003ch3 id=\"ll-37-research-grade-37-residue-peptide\"\u003e\u003cstrong\u003e LL-37 \u003cspan style=\"font-size: 12pt; line-height: 115%; font-family: Arial, sans-serif;\"\u003e – Research-Grade 37-Residue Peptide \u003c\/span\u003e \u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"margin: 0 0 20px; padding: 16px 18px; color: #c00000; background-color: #fff5f5; border: 1px solid #f0c7c7; border-left: 4px solid #c00000; font-size: 14px; line-height: 1.65;\"\u003e\u003cstrong\u003eFor research purposes only.\u003c\/strong\u003e This product is supplied exclusively for scientific laboratory research and analytical purposes. It is not intended for human or animal use, consumption, clinical use or therapeutic application. It must not be used in any way that contravenes applicable laws or the requirements of the Medicines and Healthcare products Regulatory Agency.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e \u003cspan style=\"color: #000000;\"\u003e Research-grade synthetic LL-37 peptide with batch documentation available where supplied \u003c\/span\u003e \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e \u003cspan style=\"color: #000000;\"\u003e Defined linear sequence comprising 37 amino-acid residues \u003c\/span\u003e \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e \u003cspan style=\"color: #000000;\"\u003e Human cathelicidin-derived peptide corresponding to residues 134–170 of the CAMP precursor \u003c\/span\u003e \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e \u003cspan style=\"color: #000000;\"\u003e Supplied as lyophilised laboratory material in sealed flip-top headspace vials \u003c\/span\u003e \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e \u003cspan style=\"color: #000000;\"\u003e Batch identity, chromatographic purity, peptide content and analytical specifications stated in the applicable Certificate of Analysis \u003c\/span\u003e \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e \u003cspan style=\"color: #000000;\"\u003e Handled and supplied exclusively as a research-use laboratory material \u003c\/span\u003e \u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e All of our research peptides and related laboratory materials are supplied strictly for scientific research and laboratory use only. Each vial contains lyophilised material prepared to support controlled laboratory handling and storage. The stated nominal amount refers to the declared LL-37 peptide content of a single vial, subject to the applicable batch documentation. Where dissolution or reconstitution is required, the solvent, buffer, concentration, handling procedure and storage conditions stated in the applicable Certificate of Analysis, Safety Data Sheet or validated laboratory method should be followed. We do not provide advice or recommendations concerning dosage, administration or use in humans or animals. \u003c\/span\u003e\u003c\/p\u003e\n\u003c!-- ULTIMATE PREMIUM PRODUCT SECTION --\u003e\n\u003csection style=\"box-sizing: border-box; width: 100%; margin: 32px 0; font-family: Arial, Helvetica, sans-serif;\"\u003e\n\u003cdiv style=\"position: relative; overflow: hidden; box-sizing: border-box; width: 100%; padding: 36px; background: linear-gradient(          135deg,          #020202 0%,          #090909 25%,          #1c1c1c 56%,          #101010 77%,          #030303 100%        ); border: 1px solid #d4af37; border-radius: 17px; box-shadow: 0 20px 48px rgba(0, 0, 0, 0.36),        0 0 0 1px rgba(212, 175, 55, 0.08),        inset 0 1px 0 rgba(255, 239, 170, 0.08),        inset 0 0 32px rgba(212, 175, 55, 0.035);\"\u003e\n\u003c!-- Decorative upper gold glow --\u003e\n\u003cdiv style=\"position: absolute; top: -135px; right: -105px; width: 360px; height: 360px; border-radius: 50%; background: radial-gradient(            circle,            rgba(255, 230, 139, 0.25) 0%,            rgba(212, 175, 55, 0.12) 30%,            rgba(212, 175, 55, 0.03) 52%,            rgba(212, 175, 55, 0) 73%          );\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c!-- Decorative lower gold glow --\u003e\n\u003cdiv style=\"position: absolute; bottom: -170px; left: -125px; width: 350px; height: 350px; border-radius: 50%; background: radial-gradient(            circle,            rgba(212, 175, 55, 0.15) 0%,            rgba(212, 175, 55, 0.05) 40%,            rgba(212, 175, 55, 0) 73%          );\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c!-- Decorative premium gold top edge --\u003e\n\u003cdiv style=\"position: absolute; top: 0; left: 7%; width: 86%; height: 2px; background: linear-gradient(            90deg,            rgba(212, 175, 55, 0) 0%,            rgba(247, 223, 136, 0.80) 24%,            rgba(255, 238, 169, 1) 50%,            rgba(247, 223, 136, 0.80) 76%,            rgba(212, 175, 55, 0) 100%          );\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"position: relative; z-index: 1;\"\u003e\n\u003cdiv style=\"display: inline-block; margin: 0 0 18px; padding: 8px 15px; color: #f7df88; background: linear-gradient(              135deg,              rgba(212, 175, 55, 0.14),              rgba(212, 175, 55, 0.045)            ); border: 1px solid rgba(247, 223, 136, 0.72); border-radius: 999px; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.22),            inset 0 1px 0 rgba(255, 255, 255, 0.06); font-size: 11px; font-weight: bold; line-height: 1.2; letter-spacing: 1.8px; text-transform: uppercase;\"\u003ePremium ULTIMATE Laboratory Specification\u003c\/div\u003e\n\u003ch2 id=\"ultimate-ll-37-heading\" style=\"margin: 0; color: #ffffff; font-size: 30px; font-weight: bold; line-height: 1.2; letter-spacing: 0.3px;\"\u003e\n\u003cspan style=\"color: #f4d978; text-shadow: 0 0 18px rgba(212, 175, 55, 0.23),              0 1px 0 rgba(255, 255, 255, 0.09);\"\u003e ULTIMATE \u003c\/span\u003e LL-37\u003c\/h2\u003e\n\u003cp style=\"margin: 8px 0 0; color: #f0d77d; font-size: 13px; font-weight: bold; line-height: 1.5; letter-spacing: 0.9px; text-transform: uppercase;\"\u003eEnhanced HPLC Purification and More Stringent LPS Testing\u003c\/p\u003e\n\u003cp style=\"margin: 11px 0 0; color: #d8d8d8; font-size: 15px; line-height: 1.68; letter-spacing: 0.15px;\"\u003eAdditional preparative high-performance liquid chromatography purification and a more stringent bacterial endotoxin and lipopolysaccharide testing specification for demanding scientific laboratory workflows.\u003c\/p\u003e\n\u003cdiv style=\"width: 100%; height: 1px; margin: 25px 0; background: linear-gradient(              90deg,              rgba(212, 175, 55, 0) 0%,              rgba(212, 175, 55, 0.72) 16%,              rgba(247, 223, 136, 1) 50%,              rgba(212, 175, 55, 0.72) 84%,              rgba(212, 175, 55, 0) 100%            );\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp style=\"margin: 0; color: #f1f1f1; font-size: 15px; line-height: 1.8;\"\u003eThe \u003cstrong style=\"color: #f7df88;\"\u003e ULTIMATE LL-37 range \u003c\/strong\u003e is our premium research specification for laboratories requiring an enhanced level of peptide purification and quality control. Following the standard synthesis and purification process, the finished LL-37 research material undergoes an additional preparative high-performance liquid chromatography purification stage designed to reduce residual peptide-related, synthesis-related and process-related impurities further. ULTIMATE batches are also assessed under a more stringent bacterial endotoxin and lipopolysaccharide testing specification, with the applicable analytical and batch documentation provided where supplied.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 14px; width: 100%; margin: 27px 0;\"\u003e\n\u003c!-- ADDITIONAL HPLC PURIFICATION CARD --\u003e\n\u003cdiv style=\"box-sizing: border-box; flex: 1 1 200px; min-width: 0; padding: 20px; background: linear-gradient(                145deg,                rgba(35, 35, 35, 0.97),                rgba(8, 8, 8, 0.99)              ); border: 1px solid rgba(212, 175, 55, 0.44); border-radius: 11px; box-shadow: 0 9px 22px rgba(0, 0, 0, 0.24),              inset 0 1px 0 rgba(255, 255, 255, 0.03);\"\u003e\n\u003cdiv style=\"width: 34px; height: 3px; margin: 0 0 13px; background: linear-gradient(                  90deg,                  #b8860b,                  #f7df88,                  #d4af37                ); border-radius: 3px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 8px; color: #d4af37; font-size: 12px; font-weight: bold; line-height: 1.4; letter-spacing: 1px; text-transform: uppercase;\"\u003eAdditional HPLC Purification\u003c\/div\u003e\n\u003cdiv style=\"color: #dddddd; font-size: 13px; line-height: 1.62;\"\u003eA further preparative high-performance liquid chromatography purification stage is completed after the standard peptide purification workflow.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ENHANCED ENDOTOXIN AND LPS TESTING CARD --\u003e\n\u003cdiv style=\"box-sizing: border-box; flex: 1 1 200px; min-width: 0; padding: 20px; background: linear-gradient(                145deg,                rgba(35, 35, 35, 0.97),                rgba(8, 8, 8, 0.99)              ); border: 1px solid rgba(212, 175, 55, 0.44); border-radius: 11px; box-shadow: 0 9px 22px rgba(0, 0, 0, 0.24),              inset 0 1px 0 rgba(255, 255, 255, 0.03);\"\u003e\n\u003cdiv style=\"width: 34px; height: 3px; margin: 0 0 13px; background: linear-gradient(                  90deg,                  #b8860b,                  #f7df88,                  #d4af37                ); border-radius: 3px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 8px; color: #d4af37; font-size: 12px; font-weight: bold; line-height: 1.4; letter-spacing: 1px; text-transform: uppercase;\"\u003eMore Stringent LPS Testing\u003c\/div\u003e\n\u003cdiv style=\"color: #dddddd; font-size: 13px; line-height: 1.62;\"\u003eAssessed under the enhanced ULTIMATE bacterial endotoxin and lipopolysaccharide testing specification using the applicable batch-specific analytical method.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- PREMIUM QUALITY CONTROL CARD --\u003e\n\u003cdiv style=\"box-sizing: border-box; flex: 1 1 200px; min-width: 0; padding: 20px; background: linear-gradient(                145deg,                rgba(35, 35, 35, 0.97),                rgba(8, 8, 8, 0.99)              ); border: 1px solid rgba(212, 175, 55, 0.44); border-radius: 11px; box-shadow: 0 9px 22px rgba(0, 0, 0, 0.24),              inset 0 1px 0 rgba(255, 255, 255, 0.03);\"\u003e\n\u003cdiv style=\"width: 34px; height: 3px; margin: 0 0 13px; background: linear-gradient(                  90deg,                  #b8860b,                  #f7df88,                  #d4af37                ); border-radius: 3px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 8px; color: #d4af37; font-size: 12px; font-weight: bold; line-height: 1.4; letter-spacing: 1px; text-transform: uppercase;\"\u003ePremium Research Specification\u003c\/div\u003e\n\u003cdiv style=\"color: #dddddd; font-size: 13px; line-height: 1.62;\"\u003eIntended for laboratory projects requiring additional peptide purification and an enhanced batch-specific quality-control specification.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- REGULAR VERSUS ULTIMATE COMPARISON --\u003e\n\u003cdiv style=\"box-sizing: border-box; padding: 19px 21px; background: linear-gradient(              90deg,              rgba(212, 175, 55, 0.055),              rgba(255, 255, 255, 0.025)            ); border-top: 1px solid rgba(255, 255, 255, 0.08); border-right: 1px solid rgba(255, 255, 255, 0.08); border-bottom: 1px solid rgba(255, 255, 255, 0.08); border-left: 4px solid #d4af37; border-radius: 8px; box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.012),            0 6px 16px rgba(0, 0, 0, 0.12);\"\u003e\n\u003cdiv style=\"margin-bottom: 7px; color: #f7df88; font-size: 14px; font-weight: bold; line-height: 1.4; letter-spacing: 0.2px;\"\u003eRegular or ULTIMATE?\u003c\/div\u003e\n\u003cdiv style=\"color: #e5e5e5; font-size: 14px; line-height: 1.72;\"\u003eFor the majority of routine analytical, biochemical, peptide-characterisation and general laboratory work, our \u003cstrong style=\"color: #ffffff;\"\u003e Regular research-grade LL-37 product remains highly suitable \u003c\/strong\u003e and provides an appropriate balance of peptide quality, batch documentation and value. The ULTIMATE option is intended for scientific projects where the additional preparative high-performance liquid chromatography purification stage and more stringent bacterial endotoxin and lipopolysaccharide testing specification are specifically required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin: 20px 0 0; color: #aaaaaa; font-size: 11px; line-height: 1.62; letter-spacing: 0.2px;\"\u003eULTIMATE LL-37 remains strictly for scientific laboratory research and analytical use only. It is not intended for human or animal use, clinical use, diagnostic use or therapeutic application. Identity, amino-acid sequence, terminal structure, chromatographic purity, peptide content, molecular form, counter-ion content, aggregation, bacterial endotoxin results and other analytical specifications are batch-specific and should be confirmed using the applicable Certificate of Analysis. Bacterial endotoxin or LPS testing does not constitute sterility testing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- END ULTIMATE PREMIUM PRODUCT SECTION --\u003e\n\u003ch3 id=\"ll-37-chemical-and-structural-information\"\u003e\u003cstrong\u003eChemical and Structural Information:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e LL-37\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreferred Substance Name:\u003c\/strong\u003e Ropocamptide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternative Names:\u003c\/strong\u003e Cathelicidin LL-37; human LL-37; human cathelicidin-derived LL-37; antimicrobial peptide LL-37; hCAP18-derived LL-37\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Classification:\u003c\/strong\u003e Synthetic linear 37-residue peptide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSequence Length:\u003c\/strong\u003e 37 amino-acid residues\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Amino-Acid Sequence:\u003c\/strong\u003e Leu-Leu-Gly-Asp-Phe-Phe-Arg-Lys-Ser-Lys-Glu-Lys-Ile-Gly-Lys-Glu-Phe-Lys-Arg-Ile-Val-Gln-Arg-Ile-Lys-Asp-Phe-Leu-Arg-Asn-Leu-Val-Pro-Arg-Thr-Glu-Ser\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne-Letter Sequence:\u003c\/strong\u003e LLGDFFRKSKEKIGKEFKRIVQRIKDFLRNLVPRTES\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHuman Precursor Reference:\u003c\/strong\u003e Corresponds to residues 134–170 of the human cathelicidin antimicrobial peptide precursor, CAMP or hCAP18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eN-Terminal Structure:\u003c\/strong\u003e Free leucine amino terminus\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-Terminal Structure:\u003c\/strong\u003e Free serine carboxylic acid terminus\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisulphide-Bond Content:\u003c\/strong\u003e None; the LL-37 sequence contains no cysteine residues\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCAS Number:\u003c\/strong\u003e 154947-66-7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePubChem Compound Identifier:\u003c\/strong\u003e CID 16198951\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnique Ingredient Identifier:\u003c\/strong\u003e 3DD771JO2H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMolecular Formula:\u003c\/strong\u003e C\u003csub\u003e205\u003c\/sub\u003eH\u003csub\u003e340\u003c\/sub\u003eN\u003csub\u003e60\u003c\/sub\u003eO\u003csub\u003e53\u003c\/sub\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage Molecular Weight:\u003c\/strong\u003e Approximately 4493.3 g\/mol\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproximate Molecular Size:\u003c\/strong\u003e 4.49 kDa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormula Basis:\u003c\/strong\u003e The molecular formula and molecular weight describe the uncountered LL-37 peptide with free amino and carboxylic acid termini, without formulation excipients, residual water or additional counter-ions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhysical Form:\u003c\/strong\u003e Lyophilised laboratory material, as stated in the applicable batch Certificate of Analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e White to off-white laboratory material, subject to confirmation in the applicable batch Certificate of Analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity Specification:\u003c\/strong\u003e The applicable chromatographic purity result, analytical method and acceptance criterion are stated in the batch Certificate of Analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeptide-Content Specification:\u003c\/strong\u003e Net LL-37 peptide content should be distinguished from chromatographic purity and interpreted alongside water, counter-ion and residual-solvent results\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical-Form Confirmation:\u003c\/strong\u003e The applicable Certificate of Analysis should identify whether the supplied material is uncountered LL-37, LL-37 acetate, LL-37 trifluoroacetate or another counter-ion form\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounter-Ion Confirmation:\u003c\/strong\u003e Acetate, trifluoroacetate or another counter-ion may affect the recorded material mass, water content and net peptide content of the supplied laboratory material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentity Confirmation:\u003c\/strong\u003e Product identity should be supported by sequence documentation and mass-spectrometry results consistent with the specified 37-residue LL-37 structure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggregation and Structural State:\u003c\/strong\u003e Aggregation, oligomerisation and secondary structure are separate quality attributes and are not established by a chromatographic purity percentage alone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEndotoxin Specification:\u003c\/strong\u003e The applicable bacterial endotoxin or LPS result, analytical method, reporting units, method-suitability controls and acceptance criterion should be stated in the batch Certificate of Analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalytical Interpretation:\u003c\/strong\u003e Molecular identity, amino-acid sequence, terminal structure, chromatographic purity, net peptide content, aggregation, water content, residual solvent content, counter-ion content and bacterial endotoxin results are separate analytical measurements and should be interpreted together\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e ✓ Batch documentation – Completed Certificate of Analysis documentation is provided where supplied for review. \u003cbr\u003e✓ Certificate of Analysis – Accessible through the product QR code where provided for the applicable batch. \u003cbr\u003e✓ Safety Data Sheet – Supplied to support appropriate laboratory handling, storage and regulatory compliance. \u003cbr\u003e✓ Sequence documentation – The complete 37-residue amino-acid sequence and terminal structures should be confirmed using the applicable batch records. \u003cbr\u003e✓ Mass-spectrometry documentation – Molecular identity should be supported by analytical mass data consistent with the specified LL-37 structure. \u003cbr\u003e✓ Purity documentation – The reported chromatographic purity applies only to the analytical method and batch stated in the Certificate of Analysis. \u003cbr\u003e✓ Peptide-content documentation – Net peptide content should be distinguished from chromatographic purity and interpreted alongside water, counter-ion and residual-solvent results. \u003cbr\u003e✓ Chemical-form documentation – The free peptide, acetate form, trifluoroacetate form or other counter-ion form should be identified clearly in the applicable product and batch records. \u003cbr\u003e✓ Bacterial endotoxin documentation – The applicable bacterial endotoxin or LPS result should identify the test method, reporting units, method-suitability controls and acceptance criterion. \u003cbr\u003e✓ Supplier documentation – Reviewed where supporting synthesis, purification and analytical records are supplied. \u003cbr\u003e✓ Fast, reliable and trackable express delivery – Securely packaged and dispatched using insulated or temperature-managed packaging where required by the applicable transport and storage specification. \u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr style=\"width: 100%; border: 0; border-top: 1px solid #cccccc;\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e \u003cspan style=\"color: #c00000;\"\u003e For Research Use Only \u003c\/span\u003e \u003c\/strong\u003e \u003cspan style=\"color: #c00000;\"\u003e \u003cbr\u003eThis product is supplied strictly for scientific research, laboratory analysis and experimental work. It is not intended for human consumption, animal use, clinical use, diagnostic use or any form of therapeutic application. \u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr style=\"width: 100%; border: 0; border-top: 1px solid #cccccc;\"\u003e\u003c\/div\u003e\n\u003ch3 id=\"ll-37-product-overview\"\u003e\u003cstrong\u003eLL-37 Product Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e Our \u003cstrong\u003eLL-37 research-grade synthetic peptide\u003c\/strong\u003e, also known as ropocamptide or cathelicidin LL-37, is supplied for controlled scientific laboratory investigation, analytical method development, peptide characterisation, high-performance liquid chromatography assessment, mass-spectrometry workflows and biochemical research. The material comprises a defined linear sequence of 37 amino-acid residues with a free N-terminal leucine and a free C-terminal serine carboxylic acid. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e LL-37 corresponds to the C-terminal 37-residue peptide derived from the human cathelicidin antimicrobial peptide precursor, commonly identified as CAMP or hCAP18. The LL-37 research material should not be confused with the complete human cathelicidin precursor protein, which is a larger biological molecule with a different sequence, molecular formula and molecular weight. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e The material is handled with a focus on batch traceability, documented quality control and consistent laboratory presentation. Product identity, amino-acid sequence, terminal structure, chromatographic purity, net peptide content, molecular form, counter-ion content, water content, residual solvents, aggregation, bacterial endotoxin results and other analytical specifications should be confirmed using the applicable batch Certificate of Analysis. Chromatographic purity should not automatically be interpreted as equivalent to the total net peptide content of the vial. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e The CAS number 154947-66-7, molecular formula C\u003csub\u003e205\u003c\/sub\u003eH\u003csub\u003e340\u003c\/sub\u003eN\u003csub\u003e60\u003c\/sub\u003eO\u003csub\u003e53\u003c\/sub\u003e and average molecular weight of approximately 4493.3 g\/mol describe the uncountered LL-37 peptide. Where the supplied laboratory material contains acetate, trifluoroacetate or another counter-ion, the applicable batch documentation should identify the counter-ion and its contribution to the total material mass. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e For the majority of routine analytical, biochemical, peptide-characterisation and general laboratory work, the Regular LL-37 specification remains highly suitable. The premium black-and-gold ULTIMATE LL-37 option provides an additional preparative high-performance liquid chromatography purification stage and a more stringent bacterial endotoxin and lipopolysaccharide testing specification for scientific projects requiring enhanced quality-control parameters. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/researchscientific.co.uk\/coa\/PEP035.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e View Certificate of Analysis \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/researchscientific.co.uk\/msds\/PEP035.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e View Safety Data Sheet \u003c\/a\u003e\u003c\/p\u003e","brand":"Research Scientific","offers":[{"title":"5mg - Ultimate","offer_id":54991739584850,"sku":"PEP035U","price":81.5,"currency_code":"GBP","in_stock":true},{"title":"10mg - Ultimate","offer_id":54991739617618,"sku":"PEP035U","price":151.85,"currency_code":"GBP","in_stock":true},{"title":"20mg - Ultimate","offer_id":54991739650386,"sku":"PEP035U","price":280.85,"currency_code":"GBP","in_stock":true},{"title":"50mg - Ultimate","offer_id":54991739683154,"sku":"PEP035U","price":645.95,"currency_code":"GBP","in_stock":true},{"title":"5 x 5mg Lab Pack 5 - Ultimate","offer_id":54991739715922,"sku":"PEP035UL","price":336.85,"currency_code":"GBP","in_stock":true},{"title":"10 x 5mg Lab Pack 6 - Ultimate","offer_id":54991739748690,"sku":"PEP035UL","price":672.95,"currency_code":"GBP","in_stock":true},{"title":"5 x 10mg Lab Pack 7 - Ultimate","offer_id":54991739781458,"sku":"PEP035UL","price":627.5,"currency_code":"GBP","in_stock":true},{"title":"10x 10mg Lab Pack 8 - Ultimate","offer_id":54991739814226,"sku":"PEP035UL","price":1254.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/9769\/7362\/files\/nupex-ll-37-peptide-uk-pure-fine-powder.png?v=1767887081","url":"https:\/\/nupex.co.uk\/products\/ll-37-ultimate-research-grade-peptide","provider":"Nupex","version":"1.0","type":"link"}