536 



2. ANALOGS OF ENZYME REACTION COMPONENTS 



HX 



HX 



Ribityl 



H,C 



Ribityl- 5^P04 



Riboflavin 



o 



Riboflavin- 5 '-P 



HX 



HX 



Dulcityl 



1 



Galactoflavin 



H3C 

 HX 



Lyxityl 



NH 



O 



Lyxoflavin 



HX 



HX 



HX 



HX 



CH2CH2OCOCH3 



NH 



Lumiflavin 



U-2112 



H3C 

 HX 



CH,CHXCOCHXH,C(X) 



^^^■> 



U-6538 



NH 



HX 



Ribityl 



I 

 N. 



NH 

 CH3 O 



Isoriboflavin 



