BPC-157 is a 15-residue synthetic sequence associated in published in-vitro work with fibroblast migration and nitric-oxide signalling. TB-500 is the acetylated actin-binding fragment of thymosin beta-4, studied for G-actin sequestration.
Why it matters
Different mechanisms mean different assay readouts. Different masses mean MS easily distinguishes them — and should be on every certificate.
Fragment vs parent
TB-500 is not full-length thymosin beta-4. The 43-residue parent protein is supplied separately.
Research use only. This article is educational and describes laboratory research. Nothing here is medical advice.