The Fluorescent Pigment of Aspergillus repens.

1. The fluorescent pigment produced by Aspergillus repens was isolated by adsorption on Fuller's earth, elution with methanol, and chromatography upon a magnesia column. Its absorption spectrum shows maxima at 270 and at 370—390 mμ. 2. The fluorescence spectrum of this pigment has a maximum at 455 mμ. 3. These findings, together with data derived from infrared studies and paper chromatography indicate that the fluorescent pigment is a pteridine. 4. Culture filtrates of A. repens also contain a non-fluorescent pigment, auroglaucin. [ABSTRACT FROM AUTHOR]