21869
Considering apoptosis - related factors , the polysaccharides suppressed AKT activity through the inhibition of AKT phosphorylation at Thr ( 308 ) and / or Ser ( 473 ) .
 Chemical: Thr; Chemical: Ser
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: Thr, Ser 
Answer:
 Chemical: Thr; Chemical: Ser