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Interestingly, reexpression of human MHC class II genes in RJ 2.2.5 x mouse spleen cell hybrids is associated with partial reversion of DRA promoter occupancy to the Raji pattern .
 DNA: human MHC class II genes; cell line: RJ 2.2.5 x mouse spleen cell hybrids; DNA: DRA promoter
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: human MHC class II genes, RJ 2.2.5 x mouse spleen cell hybrids, DRA promoter 
Answer:
 DNA: human MHC class II genes; cell line: RJ 2.2.5 x mouse spleen cell hybrids; DNA: DRA promoter