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Our results suggest a biological role for Elf - 1 in the regulation of IgH gene expression , attribute a functional role for receptor - induced AP - 1 proteins in B lymphocytes and provide evidence for a direct link between IgM receptor - mediated signalling and 3 ' enhancer activation .
 GENE: Elf - 1; GENE: IgH gene; GENE: AP - 1 proteins; GENE: IgM receptor
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: Elf - 1; GENE: IgH gene; GENE: AP - 1 proteins; GENE: IgM receptor