7399
We therefore demonstrate that C - P4H activity is essential for development of B . malayi and uncover a novel parasite - specific feature of these collagen biosynthetic enzymes that may be exploited in future parasite control .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None