A multiple zone phenomenon in agar plate assays with a vitamin B12-requiring mutant of Escherichia coli.
D000362:Agar; D045728:Corrinoids; D004926:Escherichia coli; D006397:Hematinics; D014805:Vitamin B 12 / Q000032:analysis*
D045728:Corrinoids; D006397:Hematinics; D000362:Agar; D014805:Vitamin B 12
ESCHERICHIA COLI; VITAMIN B12/determination