The primary chemical structure of human milk lysozyme: establishment of a temporary formula

The detailed primary sequences of the N-terminal moiety (72 amino acid residues) and of the C-terminal end (23 amino acid residues) of human milk lysozyme (129 residues) are reported. A tentative complete structure of the enzyme is compared to hen and duck egg-white lysozymes which are very near related proteins despite many amino acid replacements (around 50), the insertion of an additional residue in the N-terminal and a deletion in the C-terminal moiety.