= N-terminus
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{wiki}
The N-terminus is the amino end of a <protein> or <amino acid> chain. Sequence notation lists residues from the <N-terminus> toward the <C-terminus>, the same direction in which <biological translation> builds a chain. The two-residue example under <gene expression> places <methionine> at the N-terminal end before any subsequent processing. https://openstax.org/books/biology-2e/pages/3-4-proteins[OpenStax Biology 2e, 3.4: amino acids and polypeptide direction]{ref}
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