AssayIndex
Impurities & degradation

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.

Related terms

Coupling efficiency
The fraction of resin-bound chains that react at each synthesis step. At 99.5 % per step, a 40-mer is 82 % full-length before purification.
Truncation
A peptide missing residues from one terminus. Distinguished from an internal deletion by the mass difference matching a contiguous run of residues.

Where this term appears

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