13651
Coproporphyrinogen oxidase ( CPO ) catalyzes the sixth step of the heme biosynthetic pathway .
 protein: Coproporphyrinogen oxidase; protein: heme; protein: CPO
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: Coproporphyrinogen oxidase, heme, CPO 
Answer:
 protein: Coproporphyrinogen oxidase; protein: heme; protein: CPO