Aminotransferases share certain mechanistic features with other pyridoxal-phosphate dependent enzymes, such as the covalent binding of the pyridoxal-phosphate group to a lysine residue. On the basis of sequence similarity, these various enzymes can be grouped [<cite idref="PUB00002679"/>] into class I and class II. This entry includes proteins from both subfamilies. Aminotransferase, class I/classII