This family groups short synthetic linear peptides whose sequences correspond to segments of larger native proteins. The BPC series is a 15-residue pentadecapeptide (GEPPPGKPADDAGLV, C62H98N16O22, average mass 1419.5 Da); the thymosin entries are synthetic peptides taken from the thymosin β4 sequence, including the N-acetylated heptapeptide fragment Ac-LKKTETQ. Several members carry an N-terminal acetyl group or a C-terminal amide, and each is supplied as a lyophilized powder in a sealed vial, most often as the acetate or trifluoroacetate salt. Because the counter-ion adds to the gross vial mass, the salt form is stated on the product page wherever a verified compound record exists.
Listed here: BPC-157, SS-31, TB-500 (10mg, 25mg, 50mg, 20mg). Each product page lists the CAS number, molecular formula, molecular weight and, for peptides, the amino-acid sequence. Reported HPLC purity is shown per product; the HPLC and mass-spectrometry identity report is sent by email on request, before you order if you want to see it first.
Guides: Peptide Sciences Shut Down (March 2026): Status and Listings · SS-31 (Elamipretide, MTP-131): D-Arg-Dmt-Lys-Phe-NH2 Sequence, CAS and Counter-Ions · Is Thymosin Alpha-1 the Same as TB-500 or Thymulin? Sequences, CAS Records and Salt Form · BPC-157 in 2026: FDA List Status, Sequence, Molecular Weight, CAS and Acetate vs TFA Salt Form · Mass Spectrometry Identity Confirmation of Research Peptides: ESI, MALDI and Observed vs Calculated Mass · Peptide Sequence Notation: One-Letter and Three-Letter Codes, Termini and Modified Residues · TB-500 in 2026: FDA List Status, Full-Length Thymosin Beta-4 vs the LKKTETQ Fragment, CAS and Expected Mass
Frequently asked questions
Which compounds are listed in the BPC and thymosin category?
This page currently lists 3 compounds: BPC-157, SS-31 and TB-500, each as lyophilized powder in a sealed vial at the nominal quantity printed on the label. The product pages state the CAS number, molecular formula, average molecular weight and sequence, the reported HPLC purity for the listing and, where a verified record exists, the typical salt form, most often acetate or trifluoroacetate.
What are BPC and thymosin peptides, chemically?
Synthetic linear peptides grouped by naming convention. The BPC series is a 15-residue pentadecapeptide, GEPPPGKPADDAGLV (C62H98N16O22, average mass 1419.5 Da), with a free N-terminal amine and a free C-terminal acid. The thymosin entry is the full-length 43-residue N-acetylated thymosin β4 sequence; PubChem applies the same name to the seven-residue fragment Ac-LKKTETQ, and the TB-500 guide sets the two against each other. Other entries on the page are short synthetic peptides with an N-terminal acetyl group or a C-terminal amide, and peptide sequence notation explains how those groups are written on a listing.
Why is the salt form stated on BPC and thymosin product pages?
Lyophilized peptide salts contain the counter-ion, acetate or trifluoroacetate, in addition to the peptide, and the counter-ion adds to the gross vial mass, so the salt form is stated on the product page wherever a verified compound record exists. The analytical report states purity by RP-HPLC and identity by mass spectrometry. The counter-ion question is covered in TFA vs acetate peptide salts and how net peptide content is determined.