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Transcriptional activation of the proopiomelanocortin gene by cyclic AMP - responsive element binding protein .
 GENE: proopiomelanocortin gene; GENE: cyclic AMP - responsive element binding protein
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: proopiomelanocortin gene; GENE: cyclic AMP - responsive element binding protein