KEGG Orthology (KO) [BR:ko00001] 09100 Metabolism 09108 Metabolism of cofactors and vitamins 00860 Porphyrin metabolism [PATH:ko00860] K13604 bchU; bacteriochlorophyllide d C-20 methyltransferase [EC:2.1.1.333] Enzymes [BR:ko01000] 2. Transferases 2.1 Transferring one-carbon groups 2.1.1 Methyltransferases 2.1.1.333 bacteriochlorophyllide d C-20 methyltransferase K13604 bchU; bacteriochlorophyllide d C-20 methyltransferase [EC:2.1.1.333]