6103
Expression of wild-type SHP1 had a very small effect on the TCR-induced tyrosine phosphorylation of ZAP-70 and Syk , even when SHP1 was overexpressed 20 - 100-fold over endogenous SHP1 .
 endogenous SHP1, SHP1, SHP1, Syk, wild-type SHP1, SHP1, ZAP-70
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 endogenous SHP1, SHP1, SHP1, Syk, wild-type SHP1, SHP1, ZAP-70