2.1.1.251	corrinoid	the enzyme obligately requires the bound methylated corrinoid cofactor for activity. Corrinoid-dependent methyltransferases cycle between methylated corrinoid in the Co(III) redox state and the highly nucleophilic, reducing, and oxygen-sensitive Co(I) state. In the Co(II) form, these methyltransferase is inactive	727732	
2.1.1.251	additional information	no corrinoid cofactor bound to the enzyme	717763