21177
Structural and biochemical characterization of iPSP1 revealed that the side chains of His ( 85 ) and C - terminal region characteristic of iPSP1 are responsible for the PSP activity .
 Chemical: His; Chemical: C
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: His; Chemical: C