Pigment Production by Neurospora crassa in the Presence of para -Amino-benzoic Acid

Abstract
Wild type strains of N. crassa produce a water-soluble greenish-yellow pigment in the presence of 10-2 moles of PABA as growth proceeds, and concentrate an orange pigment in their hyphae. Conditions for the production of this pigment are presented, and a procedure is described for the isolation of the crude material. In addition, a color test is described, and sufficient properties are listed to show that it differs from the pigment found by Mayer (1944).