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We have investigated the requirements of the CH gene switch by characterizing two rearranged gamma 2b genes from a gamma 2b producing mouse myeloma ( MPC - 11 ) .
 GENE: CH gene; GENE: rearranged gamma 2b genes; GENE: gamma 2b
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: CH gene; GENE: rearranged gamma 2b genes; GENE: gamma 2b