20666
Tyr 319 is not necessarily dislodged by SH2 engagement , which activates ZAP - 70 by only ~ 5 - fold in vitro .
 Chemical: Tyr
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: Tyr