site-directed mutants of cytochrome p-450cam ( the cytochrome p-450 that acts as the terminal monooxygenase in the d-camphor monooxygenase system ) , in which threonine-252 had been changed to alanine , valine , or serine , were employed to study the role of the hydroxy amino acid in the monooxygenase reaction .
C0001898
alanine
C0002520
amino acid