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We used mouse embryonic stem (ES) cells to study globin gene expression and switching in vitro.
 DNA: globin gene; cell type: mouse embryonic stem (ES) cells
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: globin gene; cell type: mouse embryonic stem (ES) cells