1777
We found, moreover, that in SK-N-Be(2) cells protein kinase C ( PKC ) enzymatic activity was much lower compared with that in a control cell line and that the low PKC enzymatic activity was due to low PKC protein expression .
 ( protein: PKC, None) , ( protein: protein kinase C, None) , ( protein: PKC, None) , ( protein: PKC, None) , ( cell line: SK-N-Be(2) cells, None) , ( cell line: control cell line, 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: PKC, None) , ( protein: protein kinase C, None) , ( protein: PKC, None) , ( protein: PKC, None) , ( cell line: SK-N-Be(2) cells, None) , ( cell line: control cell line, None) 