5427
The gene for the RNA - dependent eIF - 2 alpha protein kinase ( PKR ) was isolated from mouse genomic DNA and characterized .
 RNA - dependent eIF - 2 alpha protein kinase, PKR
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 RNA - dependent eIF - 2 alpha protein kinase, PKR