See three dimensional structure of chicken heart, mitochondrial aspartate aminotransferase, showing the interaction between pyridoxal phosphate and the key lysine residue at the catalytic site of each subunit.

Givan CV 1980 Aminotransferases in higher plants. In (BJ Miflin ed) "The Biochemistry of Plants", Vol. 5, Academic Press, New York, pp. 329-357.

John RA, Charteris A, Fowler LJ 1978 The reaction of amino-oxyacetate with pyridoxal phosphate-dependent enzymes. Biochem. J. 171: 771-779.