13758
A mutant T cell line was isolated that lacked expression of SLP-76 ( SH2 domain-containing leukocyte protein of 76 kilodaltons), a hematopoietically expressed adaptor protein and PTK substrate .
 ( cell line: mutant T cell line, None) , ( protein: SH2 domain-containing leukocyte protein, None) , ( protein: SLP-76, None) , ( protein: PTK substrate, None) , ( protein: hematopoietically expressed adaptor protein, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: mutant T cell line, None) , ( protein: SH2 domain-containing leukocyte protein, None) , ( protein: SLP-76, None) , ( protein: PTK substrate, None) , ( protein: hematopoietically expressed adaptor protein, None) 