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These differences may mainly root in the interactions of the cofactor with the highly conserved Asp194 ( PaBphP ) that occur via its carboxylate function in bathy phytochromes .
 Chemical: Asp194; Chemical: carboxylate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Asp194; Chemical: carboxylate