Reaction catalyzed by pepsin A (3.4.23.1)
+
=
(2S)-2-[(R)-hydroxy(4-nitrophenyl)methyl]cyclohexan-1-one
4-nitrobenzaldehyde
+
cyclohexanone
=
(2S)-2-[(R)-hydroxy(4-nitrophenyl)methyl]cyclohexan-1-one