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.

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.