Microbiological assay of vitamin B12 with a mutant strain of Escherichia coli.
D001681:Biological Assay; D045728:Corrinoids; D004926:Escherichia coli / Q000187:drug effects*; D006397:Hematinics; D013180:Sprains and Strains; D014805:Vitamin B 12
D045728:Corrinoids; D006397:Hematinics; D014805:Vitamin B 12
ESCHERICHIA COLI/effect of drugs on; VITAMIN B12