several clusters of invariant residues at corresponding positions in the amino acid sequences became evident , clearly establishing that the cytosolic and the mitochondrial isoenzyme of vertebrate aspartate aminotransferase , e. coli aspartate aminotransferase , rat and e. coli tyrosine aminotransferase , and s. cerevisiae and e. coli histidinol-phosphate aminotransferase are homologous proteins .
C0684153
mitochondrial
C0004002
aspartate aminotransferase