21303
Additionally , the plant extracts down - regulated phosphorylation of IKK alpha / beta at S176 / 180 , p38 at T180 / Y182 and p65 at S536 , but not p65 at S276 .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None