A differential microbiological assay for vitamin B12 and pseudovitamin B12.
D001681:Biological Assay; D045728:Corrinoids; D006397:Hematinics; D006801:Humans; D014805:Vitamin B 12 / Q000032:analysis* / Q000031:analogs & derivatives
D045728:Corrinoids; D006397:Hematinics; C005602:pseudovitamin B12; D014805:Vitamin B 12
VITAMIN B12/determination