12957
IKK phosphorylates BAD at serine - 26 ( Ser26 ) and primes it for inactivation .
 Chemical: serine; Chemical: Ser26
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: serine, Ser26 
Answer:
 Chemical: serine; Chemical: Ser26