Attempted induction of microbial mutants requiring steroidal growth factors.
D004926:Escherichia coli / Q000208:ethnology*; D036341:Intercellular Signaling Peptides and Proteins; D050356:Lipid Metabolism; D013256:Steroids / Q000378:metabolism*; D015003:Yeasts
D036341:Intercellular Signaling Peptides and Proteins; D013256:Steroids
ESCHERICHIA COLI/culture; STEROIDS/metabolism; YEASTS