Abstract
Chromatographic and spectroscopic characterizations and comparative bioassay data are given for trisporic acid A, the separate 9- cis- and 9- trans-isomers of trisporic acids B and C, and trisporol C, all obtained from 'mated' ( plus and minus) cultures of Blakeslea trispora. All five acids show comparable levels of hormone activity on both the mating types of Mucor mucedo, whereas natural trisporol C more specifically affects a plus strain and the laboratory-derived methyl esters are minus-specific. Similarly plus and minus strains of B. trispora convert trisporol C and the esters into trisporic acids at different rates, and they effect different transformations of administered methyl 14C-trisporate C.
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