Industrial Biotransformations

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2 The Enzyme Classification
EC 5.3.1 Interconverting aldoses and ketoses
R 1
OH
O
R 2
R 1,2 = hydrogen, organic residue
R 1
O
OH
If R 1 is a hydrogen atom, then R 2 is any organic residue and vice versa.
EC 5.3.2 Interconverting keto–enol-groups
R 1
O
R 2
R 1,2 = hydrogen, organic residue
R 1
EC 5.3.3 Transposing C=C bonds
R 1
R 4
R 2
R 5
R 3
R 1,2,3,4,5 = organic residue
R 1
EC 5.3.4 Transposing S–S bonds
cysteine 1 SH + cysteine 2
R 4
R 2
OH
The cysteine residues are parts of proteins.
R 2
R 2
R 5
R 3
cysteine 3 S S cysteine +
1
cysteine 2
S S cysteine 3
HS