Endothelin-1 is a 21-amino-acid peptide with a dual disulfide-bridged structure that acts at ETA and ETB receptors to regulate vascular tone, cardiac function and renal physiology. Investigators use it as the standard endothelin agonist in receptor-binding and vasoactivity studies, and the defined sequence supports reproducible functional assays. In vascular research, this 21-amino-acid peptide is usually the reference agonist in ETA/ETB receptor-binding and vasoactivity assays, where its dual disulfide structure is the feature under study, and investigators compare it against selective receptor antagonists. Fresh dilutions are prepared for each preparation, and the defined sequence keeps functional readouts reproducible. Our records verify purity per batch. For this 21-mer, the parcel includes the analysis record and reconstitution notes, and the lyophilized peptide reconstitutes for ETA/ETB binding and vasoactivity assays. We can supply matched vials for comparative studies and coordinate delivery within recommended conditions. Trial and bulk quantities are available. As a factory-connected supplier, we keep stable stock of popular peptides and can accommodate custom pack sizes, OEM labeling and private-label requests. Shipments are handled by experienced logistics partners with secure packing and reliable delivery timelines. Questions about specifications, certificates or shipping are always welcome: WhatsApp +852 4423 6619, Aurora is your contact, 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.

This guarantees that global research teams—whether stationed in bustling urban laboratories or serene academic institutions—can trust the integrity of their biochemical and life science studies. In these collaborative spaces, the air thrums with the quiet intensity of discovery as scientists lean over microscopes, 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.

This ensures that global research teams—whether based in bustling urban laboratories or serene academic institutions—can trust 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, 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.