7-keto 8-
aminopelargonic
acid
transporter
7,8-diamino-
pelargonic
acid
aminotransferase
dethiobiotin
synthetase
biotin
synthase
Polyethylene
glycol
Polyethylene
glycol
S-
Adenosylmethionine
Diaminopimelic
acid
S-Adenosyl-4-
methylthio-2-
oxobutanoate
ATP
CO
2
ADP
P
i
H
+
Dethiobiotin
S-
Adenosylmethionine
Biotin
L-Methionine
5'-
Deoxyadenosine
Reduced
ferredoxin
a sulfurated
[sulfur
carrier]
an
unsulfurated
[sulfur
carrier]
Oxidized
ferredoxin