AssayIndex
Impurities & degradation

Aspartimide

A cyclic imide formed at an Asp-X motif, −18.011 Da. Hydrolyses to a mixture of α- and β-aspartyl peptides, the latter mass-identical to the parent.

Related terms

β-Aspartyl isomer
A peptide in which the backbone connects through the aspartate side-chain carboxyl. Mass-identical to the parent and barely resolved. Requires a dedicated method.
see also Aspartimide
Asp-Gly motif
An aspartate followed by a glycine. The most aspartimide-prone sequence in peptide chemistry. Epitalon's defining analytical problem.
see also Aspartimide

Where this term appears

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