Does a product name prove the C-terminus is an amide?

No. Use the species and the mass basis printed on the lot file. If the file is silent, do not choose a form.

Is amidation a purity percentage?

No. It describes a chemical end of the chain. Purity remains the chromatographic figure, when the report includes one.

Glossary · 2026-09-24

C-terminal amidation, laboratory definition

Amidation, in this glossary, means a C-terminal amide rather than a C-terminal carboxylic acid. The two ends are different species. An identity check has to use the form written on the report. Swapping acid and amide in the margin can make a calculated mass miss the observed ion even when the residue string is otherwise the same.

The C-terminus term names that end of the chain. The sequence term covers how residues are written. Neither term authorizes a receiver to edit a mass calculation. See the COA reading guide. Research use only.

Published lot files for this catalogue are indexed in the certificates library. This definition does not add a report, and it does not assign a task identifier. Research use only.

Frequently asked questions

Does a product name prove the C-terminus is an amide?: No. Use the species and the mass basis printed on the lot file. If the file is silent, do not choose a form.
Is amidation a purity percentage?: No. It describes a chemical end of the chain. Purity remains the chromatographic figure, when the report includes one.

Research use only. BlueNex Labs does not provide medical or veterinary advice. Confirm your institution’s policies before purchase. How a comparison or class note is checked sits on documentation standards. The biochemist of record is Alice Kay, Ph.D.