8688
An in vivo ZAP - 70 substrate , SLP - 76 , implicated in Erk activation , also became rapidly tyrosine - phosphorylated in Jurkat cells , but not in P116 cells , upon treatment with H2O2 .
 ZAP - 70, SLP - 76, Erk
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 ZAP - 70, SLP - 76, Erk