FATTY-ACID BIOSYNTHESIS IN NOVEL UFA MUTANTS OF NEUROSPORA-CRASSA

New mutants of Neurospora crassa having the ufa phenotype have been is olated. Two of these mutants, like previously identified ufa mutants, require an unsaturated fatty acid for growth and are almost completely blocked in the de novo synthesis of unsaturated fatty acids. The new mutations map to a different chromosomal location than previously char acterized ufa mutations. This implies that at least one additional gen etic locus controls the synthesis of unsaturated fatty acids in Neuros pora.