13566
musculin : a murine basic helix-loop-helix transcription factor gene expressed in embryonic skeletal muscle .
 musculin, murine basic helix-loop-helix transcription factor gene
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 musculin, murine basic helix-loop-helix transcription factor gene