STRUCTURAL FACTORS IN POLYMERIZATION 



55 



0.4 



Fig. g. Comparison between sponge pig- 

 ment and synthetic quinone polymers 

 formed on collagen. 



03 



o 



o 0.2 



k- 

 O 



in 

 < 



0.1 - 



• — •Sponge Extroct 

 0--0 Supernatant - 



Collagen (pH 4.3) 



-©8M Urea Extr. from 



Collogen (pH 4.3) 



-©5M LiCI Extr. from 



Collagen (pH 4 3) 



400 



500 



600 



O 



c 

 o 



o 



(A 



< 



1 Black Gulneo Pig Melanin (KOH) 



2 and 3 Extr Fibrin 



pH 8 8 (Ethonol) 



I Ptarogonia Pigment 



2. Extr Fibrin pH 5 5 (Ureo) 



3. Extr. Fibrin pH 5 5 (H^O) 



I. 



400 500 600 400 500 600 



A (mp) 



Fig. 10. Comparison of guinea pig and I'tcrogonui melanin with synthetic [nilymer formed 

 on fibrin. 



