THE PIGMENTS OF MICRO-ORGANISMS 397 



COUH 



I 

 C CO 



^\ /\ 



HO.C C Cv 



I II II \ 



I II II }c,-a,o 



II 11/ 



HO.C C C/ 



CH O 



whilst citrinin, a yellow pigment produced by P. citrinum 

 and A. terreus, is : — 



CgHg 



C 

 /% 



% / % 



C C.OH 



CHo.C C 



% /% 



C C.COOH 



CH,.CH 



For further reading : — 



R. E. Buchanan and E. I. Fulmer, " The Physiology and Biochemistry of 

 Bacteria," Vol. I, Chapter III. Bailliere, Tindall & Cox. London, 

 1928. 



H. Raistrick and collaborators, Papers in Biochemical Journah 1931 onwards 



