13184
In 29 of these patients , levels of TCRzeta and p56(lck) were determined by Western blots of T-cell lysates and semiquantitated using densitometry .
 ( protein: p56(lck), None) , ( protein: TCRzeta, 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:
 ( protein: p56(lck), None) , ( protein: TCRzeta, None) 