1. 
   Coproporphyrinogens
   Coproporphyrinogens are tetrapyrroles with four propionic acid groups and an equal number of substituted methyls. Coproporphyrinogen III is the most common variance. In the metabolism of porphyrin, it is formed from uroporphyrinogen III by the enzyme uroporphyrinogen III decarboxylase, and it is co...
   Found op http://en.wikipedia.org/wiki/Coproporphyrinogens
   
   
2. 
   coproporphyrinogens
   Porphyrinogens which are intermediates in the haem biosynthesis. They have four methyl and four propionic acid side chains attached to the pyrrole rings. Coproporphyrinogens I and III are formed in the presence of uroporphyrinogen decarboxylase from the corresponding uroporphyrinogen. They can yield...
   Found op http://www.mondofacto.com/facts/dictionary?coproporphyrinogens
   
   

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