The end of a peptide or protein chain that contains a free amino group.
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N~5~-(diaminomethylidene)-N~2~-methyl-D-ornithyl-N-{(2S)-4-amino-1-carboxy-4-formyl-5-[(E)-iminomethyl]-3,7-dioxo-7-phenylheptan-2-yl}glycinamide
Z-Val-D-Leu-OH
