12899
Using human T lymphocytes and T cell lines , we show that progesterone , at concentrations found in the placenta, rapidly and reversibly blocks voltage-gated and calcium-activated K+ channels ( KV and KCa , respectively), resulting in depolarization of the membrane potential .
 ( protein: KCa, None) , ( cell type: T lymphocytes, None) , ( cell type: human T lymphocytes, None) , ( protein: KV, None) , ( cell line: T cell lines, 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: KCa, None) , ( cell type: T lymphocytes, None) , ( cell type: human T lymphocytes, None) , ( protein: KV, None) , ( cell line: T cell lines, None) 