Complete amino acid sequence of amelogenin in developing bovine enamel

Pure amelogenin protein in developing bovine incisor enamel was isolated and its primary structure was investigated by sequencing the peptides obtained after clostripain and chymotrypsin digestions and CNBr degradation with an automated Edman sequencer. The enamel protein was found to be composed of 170 amino acid residues with one phosphate having a molecular weight of 19,350 and its complete amino acid sequence was elucidated. This protein has no sequence homology with any other tissue or secretory protein of known structure.