Apelin-13 is supplied as white lyophilized powder with molecular formula C63H101N23O15S and molecular weight 1567.8. Apelin-13 is a short endogenous peptide ligand of the APJ receptor and one of the most active apelin isoforms in cardiovascular and metabolic research. Laboratories apply it to studies of cardiac contractility, vasodilation and fluid homeostasis, as well as to endothelial angiogenesis assays. In metabolic research it is used to examine insulin sensitivity, adipocyte function and energy expenditure. Because it is rapidly degraded in plasma, many protocols include protease inhibitors or use it in short-exposure designs; receptor pharmacology studies also employ it as the reference agonist for APJ antagonists. Storage practice depends on how the material will be used. For a series of experiments spread over several months, keep the sealed vial at minus 20 degrees Celsius and withdraw only the quantity needed for each session. If the whole vial will be consumed within one week, reconstitute once, filter if the assay requires sterility, and hold the solution at 2 to 8 degrees Celsius protected from light. Do not store reconstituted peptide at room temperature for extended periods. YIWU SHUNXIAN TRADING CO., LTD. stands as a beacon of precision and reliability in the realm of high-purity research-grade peptides and essential laboratory consumables. As a professional supplier, we are meticulously dedicated to empowering global research teams in their groundbreaking biochemical and life-science studies. With unwavering commitment, we bridge the gap between meticulously qualified peptide raw-material resources, each batch rigorously tested for purity and consistency, and a robust network of stable international logistics services, ensuring that cutting-edge research materials reach laboratories worldwide with the utmost efficiency and care. Our offerings provide researchers and industry partners with a dependable, trustworthy source, fostering an environment where innovation thrives, experiments yield accurate results, and laboratory development projects progress seamlessly, supported by the highest standards of quality and service. Dispatch is normally within one to two business days after order confirmation, using tracked international courier services. Lyophilized peptides travel well at ambient temperature for typical transit periods, and gel packs are added when a destination or season makes temperature excursion a concern. Tracking details are provided at dispatch, and consolidated shipping is available when a laboratory orders several products at the same time. Conformity assessment relies on reverse-phase HPLC at 214 nm, supported by electrospray mass spectrometry for identity confirmation. Each lot is released only when the chromatographic purity reaches 99 percent or above, and residual trifluoroacetate, water content and endotoxin levels are recorded on the batch record. Analytical chromatograms and mass spectra are archived so that a research group can request the corresponding data for a specific lot number when a reviewer or internal audit requires supporting information. For quotations, packing options, lot documentation or delivery scheduling, contact Aurora on WhatsApp at +852 4423 6619, or write to 18963519387@163.com with the product name, required quantity and destination country. Including the intended application and any buffer or solubility constraints helps us recommend the most suitable pack size and confirm the practical transit window for your location. Standard pack sizes are 5 mg, 10 mg, 25 mg and 50 mg per vial, with larger quantities available on request. Vials are amber glass with butyl rubber stoppers and aluminum crimp seals, labelled with product name, lot number, CAS number, net mass and storage condition. Outer cartons use molded cushioning to protect the cake during transit, and orders containing several peptides are packed so that vials remain physically separated and cannot abrade one another.