580
Here, Stuart Schreiber and Gerald Crabtree review recent findings that indicate CsA and FK506 operate as prodrugs : they bind endogenous intracellular receptors , the immunophilins , and the resulting complex targets the protein phosphatase, calcineurin , to exert the immunosuppressive effect .
 protein: immunophilins; protein: endogenous intracellular receptors; protein: protein phosphatase,; protein: calcineurin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: immunophilins; protein: endogenous intracellular receptors; protein: protein phosphatase,; protein: calcineurin