A look at the pentadecapeptide sequence, composition, solubility behavior and storage considerations for BPC-157 as a chemical standard.
Primary sequence
BPC-157 is composed of fifteen amino acids in the order Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. The high proline content in the amino-terminal portion contributes to a constrained backbone, while the acidic Glu and Asp residues and the basic Lys residue give the molecule a mixed charge profile that influences its chromatographic behavior.
Composition and mass
The molecular formula C62H98N16O22 corresponds to a calculated monoisotopic and average mass consistent with the nominal value near 1419.5 g/mol. These figures are the primary anchors used in mass-spectrometric identity checks, where the observed mass of the reagent is compared against the theoretical value derived from the sequence.
Solubility in the lab
As a small, charged peptide, BPC-157 is generally handled in aqueous or mildly aqueous laboratory buffers, with solubility influenced by pH and ionic strength. For analytical work, dilute acidic or neutral aqueous systems are common. Solubility notes here are purely for preparing standards and chromatography samples, not for any other purpose.
Stability and storage
Like most peptides, the lyophilized solid is best kept cold, dry and protected from light to limit hydrolysis and oxidation over time. Once a working solution is prepared in the lab, it is typically treated as relatively short-lived and stored cold. Freeze-thaw cycling is generally minimized to preserve the integrity of the reference standard.