AssayIndex
Impurities & degradation

Capping

Deliberately acetylating unreacted amines during synthesis so failed couplings terminate as short capped species rather than continuing as deletion sequences.

Related terms

Acetylation
Addition of an acetyl group, +42.011 Da. Either a deliberate synthesis capping step or an unwanted side reaction.
see also Capping
Deletion sequence
A peptide missing one or more residues from an incomplete coupling. Mass difference equals the missing residue mass. A synthesis finding: it does not form in a vial.

Where this term appears

The glossary exists to make record pages readable without a chemistry degree. Every technical term on a report resolves here.