The FDA classifies alpha-amino acid polymers of 40 amino acids or less as peptides, requiring that any individual impurity exceeding 0.10% be…

The integrity of in-vitro research in 2026 depends entirely on the empirical proof of the molecular substrate, not the reputation of the supplier….

A supplier’s reputation is secondary to their raw analytical data. Inconsistent lot purity remains a primary cause of failed in-vitro assays and…