8161
Expression from this element is regulated by a heteromeric protein complex containing ubiquitous ( i . e . the E2A - and HEB - encoded proteins ) and islet - enriched members of the bHLH family .
 E2A, HEB - encoded proteins, bHLH family
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 E2A, HEB - encoded proteins, bHLH family