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A new B - cell - specific enhancer element has been identified 3 ' of E4 and the octamerlike motifs in the human immunoglobulin heavy - chain gene enhancer .
 GENE: E4; GENE: human immunoglobulin heavy - chain gene enhancer
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: E4; GENE: human immunoglobulin heavy - chain gene enhancer