Microbiological assay of vitamin B12 in preparations containing antibiotics using an antibiotic-resistant, B12-requiring mutant of Escherichia coli.
D000900:Anti-Bacterial Agents; D000904:Antibiotics, Antitubercular; D001681:Biological Assay; D045728:Corrinoids; D003879:Dermatologic Agents; D004926:Escherichia coli; D006801:Humans; D014805:Vitamin B 12 / Q000032:analysis*
D000900:Anti-Bacterial Agents; D000904:Antibiotics, Antitubercular; D045728:Corrinoids; D003879:Dermatologic Agents; D014805:Vitamin B 12
ANTIBIOTICS; ESCHERICHIA COLI; VITAMIN B12/determination