25971
In addition , UBR2 up - regulation required p38 beta - mediated phosphorylation of CCAAT / enhancer binding protein ( C / EBP ) - beta Thr - 188 , which was critical to C / EBP beta binding to the UBR2 promoter .
 Chemical: Thr
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: Thr