571 Pteridines and Fla vines 



1063 Ptcridine pigment. 



A pigment which fluoresces under U.V. light is produced 

 by Microsporum species (some of which cause ringworm). 

 This pigment has been isolated and purified to some ex- 

 tent. The infrared spectrum indicates that it is a pteridine, 

 probably trisubstituted, and possibly 2-NHo (or — OH), 

 4— OH and 6— CH.OH substituted. 



Microsporuw gijpseum, M. canis 



Frederick T. Wolf, Ernest A. Jones and Helene A. Nathan, 

 Nature 182 475 (1958). 



