4872
We show here that RA and E1A induce phosphorylation of the E1A - associated 300 kDa protein ( p300 ) during the differentiation of F9 cells .
 E1A, E1A - associated 300 kDa protein, p300
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 E1A, E1A - associated 300 kDa protein, p300