6259
Nuclear protein phosphatase 2A dephosphorylates protein kinase A - phosphorylated CREB and regulates CREB transcriptional stimulation .
 Nuclear protein phosphatase 2A, protein kinase A, CREB, CREB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Nuclear protein phosphatase 2A, protein kinase A, CREB, CREB