VIP Peptide Powder CAS 40077-57-4

A: The C-terminal α-amidation of VIP is critical for high-affinity receptor binding and full biological activity. Our VIP peptide powder CAS 40077-57-4 is synthesized using robust methods and verified by Mass Spectrometry (MS) to ensure intact amidation. Each COA includes MS data confirming the correct molecular weight and structure.

A: This product is readily soluble in water or 1% acetic acid, resulting in a clear, colorless to slightly yellow solution. For stock solutions intended for long-term storage, aliquot and store at -20°C, avoiding repeated freeze-thaw cycles. Organic solvents (e.g., DMSO) are not recommended unless required by your specific assay.

A: We provide physicochemical data such as MS, HPLC, and amino acid analysis, but do not directly supply functional selectivity data. However, high purity and correct amidation ensure a solid foundation for receptor binding; researchers can perform their own selectivity assays using this material.

A: Our standard product has endotoxin levels < 10 EU/mg. For more demanding applications such as animal studies, we can supply low-endotoxin batches (e.g., < 1.0 EU/mg or lower), with results clearly stated on the COA. Please specify your requirement when ordering.

A: The lyophilized powder is stable for 24 months when stored at -20°C under dry conditions. Reconstituted solutions are stable for 24-48 hours at 4°C, but should be aliquoted and stored at -20°C or -80°C for long-term use. Repeated freeze-thaw cycles should be avoided as they can degrade the peptide. Stability study summaries are available upon request.