22823
Computational modeling indicated that 1 can bind to PPAR alpha , gamma , and delta each in a distinct manner , while it can activate PPAR alpha only by forming a hydrogen bond with Y464 , thus stabilizing the AF - 2 helix and activating PPAR alpha .
 Chemical: hydrogen
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: hydrogen