6431
Mutations at three sites have larger effects in muscle than nonmuscle cells ; an A / T - rich site mutation has a pronounced effect in both striated muscle types , mutations at the MEF1 ( Right E - box ) site are relatively specific to expression in skeletal muscle , and mutations at the CArG site are relatively specific to expression in cardiac muscle .
 GENE: MEF1 ( Right E - box ) site
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: MEF1 ( Right E - box ) site 
Answer:
 GENE: MEF1 ( Right E - box ) site