| Module | | M00846 | Siroheme biosynthesis, glutamyl-tRNA => siroheme | 
 | M00924 | Cobalamin biosynthesis, anaerobic, uroporphyrinogen III => sirohydrochlorin => cobyrinate a,c-diamide | 
 | M00925 | Cobalamin biosynthesis, aerobic, uroporphyrinogen III => precorrin 2 => cobyrinate a,c-diamide | 
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| Authors | Storbeck S, Walther J, Muller J, Parmar V, Schiebel HM, Kemken D, Dulcks T, Warren MJ, Layer G | 
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| Authors | Leustek T, Smith M, Murillo M, Singh DP, Smith AG, Woodcock SC, Awan SJ, Warren MJ | 
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