Amino Acid Sequencing - A partial sequencing (8- 15 residues) of organic amino acids supplier acids inside a protein or polypeptide by both amino- terminal or carboxy-terminal sequencing. This methodology is completed to obtain information about the primary structure of the protein, its homogeneity, and the presence or absence of polypeptide cleavages. FDA should have the ability to verify the accuracy and the appropriateness of the information contained in the EA.