. "\"Interacting selectively and non-covalently with a protein N-terminus, the end of any peptide chain at which the 2-amino (or 2-imino) function of a constituent amino acid is not attached in peptide linkage to another amino-acid residue.\" [ISBN:0198506732]" . . "protein N-terminus binding" . "N-terminal binding" . "N-terminal end binding" . . "amino-terminal binding" . "amino-terminus binding" . "NH2-terminal binding" . "NH2-terminus binding" .