6560
In vivo , selective activation of SAPKs stimulates formation of the ternary complex containing Elk - 1 , serum response factor and the serum response element , and enhances Elk - 1 - dependent transcription .
 SAPKs, Elk - 1, serum response factor, Elk - 1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 SAPKs, Elk - 1, serum response factor, Elk - 1