BPC-157 and TB-500 are two distinct research reference materials that are often listed side by side and are easy to confuse, partly because they are sometimes sourced together. This page compares them on identity alone, meaning their names, registry numbers, molecular descriptions, and sequences, so the two can be told apart from the certificate rather…

Selank and Semax are two synthetic research peptides that are often catalogued side by side and, because both are short synthetic chains that close with the same Pro-Gly-Pro motif, are sometimes confused for one another. They are distinct reference materials with different registry numbers, different parent sequences, and different molecular formulas. This page compares the…

TB-500 is a name used across the research-peptide market for material related to thymosin beta-4, and that name does not map cleanly onto a single chemical registry entry. Depending on the supplier, “TB-500” has been catalogued as the full-length thymosin beta-4 molecule, as the actin-binding region of that molecule, or as a short synthetic acetylated…

Tirzepatide (GLP2-TZ), catalogued at livvmore under the house code GLP2-TZ, is a synthetic 39-residue peptide supplied strictly as a laboratory research reference material. This profile sets out its verified chemical identity, structural features, physical characteristics, and the analytical methods used to confirm identity and purity per batch. Every figure below is drawn from public chemistry…

Semaglutide (GLP1-SM), catalogued at livvmore under the house code GLP1-SM, is a synthetic 31-residue peptide supplied strictly as a laboratory research reference material. This profile sets out its verified chemical identity, structural features, physical characteristics, and the analytical methods used to confirm identity and purity per batch. Every figure below is drawn from public chemistry…

A laboratory reference for the co-formulated CJC-1295 (No-DAC) + Ipamorelin specimen: each peptide’s sequence, molecular formula and weight, and the LC-MS/HRMS identity testing used to confirm both components.

Why a research peptide vial’s labelled mass is not all peptide: counter-ions and salt form, water, and fill all add weight. How net peptide content differs from HPLC purity and how a Certificate of Analysis records each figure.

A laboratory reference for how research-peptide names and sequence codes are built: one-letter and three-letter residue codes, terminal modifications such as Ac- and -NH2, DAC versus No-DAC, and development code numbers like BPC-157.

A plain-language laboratory reference defining the documentation and analytics terms on a peptide Certificate of Analysis: COA, HPLC, LC-MS, HRMS, mass accuracy, % area, CAS number, lot and batch, net peptide content, molecular weight, retention time, and identity versus purity.

What a CAS Registry Number is, how it differs from molecular formula and weight, and how a peptide’s identity is verified against a Certificate of Analysis and a mass-spec measurement.