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The infection of cells with Moloney murine leukemia virus ( M - MuLV ) causes an increase in specific cellular gene products , including the major histocompatibility complex ( MHC ) class I antigens .
 GENE: major histocompatibility complex ( MHC ) class I antigens
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: major histocompatibility complex ( MHC ) class I antigens