17471
This insertion fragment contains 17 genes , including Hand2 , that encode the basic helix - loop - helix transcription factor and is syntenic to the distal end of human Chr4 , 4q32 . 3 to 4q34 . 1 , which is responsible for 4q + .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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