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To test the hypothesis that the chimera PMLRAR alpha plays a role in leukemogenesis , we expressed a PMLRAR alpha cDNA in myeloid cells of transgenic mice .
 DNA: PMLRAR alpha cDNA; cell type: myeloid cells; protein: chimera PMLRAR alpha
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: PMLRAR alpha cDNA, myeloid cells, chimera PMLRAR alpha 
Answer:
 DNA: PMLRAR alpha cDNA; cell type: myeloid cells; protein: chimera PMLRAR alpha