9984
Valine residues in the pore region of SK2 ( V366 ) and SK3 ( V520 ) were replaced by either an alanine or a phenylalanine to evaluate the impact on the interactions with the allosteric blocker apamin .
 Chemical: Valine; Chemical: alanine; Chemical: phenylalanine
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: Valine; Chemical: alanine; Chemical: phenylalanine