N-terminus

https://doi.org/10.1351/goldbook.09754
The end of an amino acid chain (protein or polypeptide), terminating in a free primary amine group.
Source:
PAC, 2018, 90, 1121. (Terminology of bioanalytical methods (IUPAC Recommendations 2018)) on page 1157 [Terms] [Paper]
Citation: 'N-terminus' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.09754 RIS BibTex EndNote
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