Abstract
A mutant of Candida utilis containing about five fold amount of cytochrome c than that of a parental strain was induced by N-methyl-N'-nitro-N-nitrosoguanidine. In this mutant (I-35), repression of cytochrome c synthesis by glucose was not observed, while the parental strain was repressed cytochrome c content by glucose in medium. The amount of cytochrome c in the mutant varied from phase to phase in its growth stage. Iso-2-cytochrome c was found both in the parent and the cytochrome c abundant mutant, and was about 10% of total amount of cytochrome c in the both strains.
