LL-37 is a cationic antimicrobial peptide belonging to the cathelicidin family, the only human cathelicidin, widely studied in innate immunity and host-defense research. It is supplied as a high-purity white lyophilized powder, >=99% by HPLC, in sealed vials for laboratory use. LL-37 is investigated for its antimicrobial, immunomodulatory and wound-healing properties, and is commonly applied in cell-culture, infection and inflammation research. As a host-defense peptide with a defined sequence, it does not carry a single unified CAS number. The lyophilized presentation provides good stability and reproducible reconstitution for consistent dosing. Strict batch quality control is maintained and COA can be provided on request. For storage keep sealed at 2-8 degree C away from light and moisture. Host-defense studies built around LL-37 usually combine bactericidal readouts with membrane-interaction and immune-cell assays, since the peptide's activity depends on the context in which it is tested. The 37-residue sequence keeps synthesis reproducible, and investigators routinely check cytotoxicity in parallel to separate direct killing from immune effects. The lyophilized material reconstitutes in physiological buffer, and our records verify purity per lot. Because infection and immunology programs reorder frequently, we keep stock and coordinate repeat deliveries within recommended handling conditions. The 37-mer dissolves in physiological buffer for the concentrations used in antimicrobial assays, and our notes specify preparation and storage conditions for the readout schedule. Because infection and immunology programs test multiple conditions, we can supply matched vials from one lot and coordinate repeat deliveries. Packing is chosen to preserve activity through transit, and bulk sets are available. We are a professional peptide supplier with in-house quality control, offering both small trial packs and bulk quantities at factory-direct prices. Every order is packed carefully and dispatched with tracking, and our team provides responsive after-sales support for research customers worldwide. Our team replies quickly to all inquiries: WhatsApp +852 4423 6619, contact person Aurora, email 18963519387@163.com. YIWU SHUNXIAN TRADING CO., LTD. stands as a beacon of precision and reliability in the field of scientific research, emerging as a premier supplier of high-purity research-grade peptides and an extensive range of meticulously crafted laboratory consumables. Each peptide - a chain of amino acids refined to perfection - is delivered with crystalline clarity, a testament to its exceptional purity. This ensures that global research teams, whether based in bustling urban laboratories or serene academic institutions, can trust in the integrity of their biochemical and life science studies. In these collaborative spaces, the air hums with the quiet intensity of discovery as scientists lean over microscopes, their eyes alight with curiosity, handling vials of these molecular building blocks. The accompanying laboratory consumables - from sterile pipette tips that glint like tiny glass stars to centrifuge tubes engineered for unwavering stability - are more than mere tools; they are silent partners in the pursuit of knowledge, enabling experiments to unfold with seamless precision. Dedicated to supporting this global tapestry of innovation, YIWU SHUNXIAN TRADING CO., LTD. weaves itself into the fabric of scientific progress, providing the foundational elements that transform hypotheses into breakthroughs and dreams into discoveries, fostering a world where the boundaries of life sciences are continuously pushed forward. We bridge qualified peptide raw-material resources with stable international logistics services, offering researchers and industry partners a dependable source for their laboratory development projects.