5183
Pretreatment with a protein kinase C activator , phorbol 12-myristate 13-acetate , caused almost complete inhibition of histamine -induced [ Ca2+ ]i rise , but did not do so by activators of cAMP- and cGMP- dependent protein kinases .
 ( protein: protein kinase C, 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: protein kinase C, None) 