6476
Finally , the Pak1 ( - / - ) mice exhibited reduced brainstem gcg level and abolished beta - cat Ser675 phosphorylation in brain neurons after insulin treatment .
 Chemical: Ser675
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Ser675 
Answer:
 Chemical: Ser675