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Phylogenetic analysis using a neighbor - joining algorithm showed closest similarity of the horse mu chain - encoding constant region gene to human and dog sequences .
 GENE: horse mu chain - encoding constant region gene
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: horse mu chain - encoding constant region gene