>sp|Q53139|COBK_RHOER Precorrin-6A reductase OS=Rhodococcus erythropolis GN=cobK MTRILILGGTGEARALAAALADVPGVEAVSSLAGRVRDPRLPVGDVRIGGFGGADGLAEC VRAHPVDAIVDATHPFAAQITRNAADAAHRRGIPLVVLRRPEWSPRPGEHWHGAADLADA AELLPDLGTRIFLTIGRQGVDAFADLQALWFLIRAIDPPDVAMPPHSTLLLARGPFAVAD ETALMREHRIDVLVTKNSGGGQTDAKLDAARALGIPVLMIRRPPLPPATETVDDVAGAIA WVGTLTRR