SUPERSUPPRESSIBLE MUTANTS IN NEUROSPORA: MUTANTS AT THE tryp-1 AND tryp-2 LOCI AFFECTING THE STRUCTURE OF THE MULTIENZYME COMPLEX IN THE TRYPTOPHAN PATHWAY

and DEMOSS 1963) as no anthranilate synthetase could be detected in crude extracts of this mutant. In addition, these same strains were tested for growth on a medium containing 20 pg/ml of anthranilic acid. None of them grew, showing that the suppressor did not restore PRA isomerase and InGP synthetase.