- 17 



Figure I,3o Leaf xanthophylls separated by chromatographic adsorp= 

 tion of chloroplast pigments in a column of activated 

 magnesia plus Celite (lg2 by weight). Pigments ad- 

 sorbed from petroleum ether and washed with petrolexin 

 ether containing 25 per cent acetone o The sequence 

 of the zeaxanthin and neoxanthin zones varied with 

 the plant material due, apparently, to the presence 

 of colorless, sorbed substanoeso 



-G. 

 -G 

 -G^ 

 -G^ 



ALTERED 

 CHLOROPHYLLS 



/O ZEAXANTHIN 

 ^Y NEOXANTHIN 



-Y LUTEIN 



-Y VIOLAXANTHIN 



