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To examine the role of EKLF in the developmental regulation of the human gamma-globin gene we interbred EKLF heterozygotes (+/-) with mice harboring a human beta-globin yeast artificial chromosome transgene .
 protein: EKLF heterozygotes; DNA: human beta-globin yeast artificial chromosome transgene; protein: EKLF; DNA: human gamma-globin gene; protein: EKLF
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: EKLF heterozygotes, human beta-globin yeast artificial chromosome transgene, EKLF, human gamma-globin gene, EKLF 
Answer:
 protein: EKLF heterozygotes; DNA: human beta-globin yeast artificial chromosome transgene; protein: EKLF; DNA: human gamma-globin gene; protein: EKLF