2260
Here we report that ATRA -induced expression of CD38 antigen in myeloid cells is mediated through retinoic acid-alpha receptor ( RAR alpha ).
 protein: CD38 antigen; protein: retinoic acid-alpha receptor; cell type: myeloid cells; protein: CD38; protein: RAR 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: CD38 antigen, retinoic acid-alpha receptor, myeloid cells, CD38, RAR alpha 
Answer:
 protein: CD38 antigen; protein: retinoic acid-alpha receptor; cell type: myeloid cells; protein: CD38; protein: RAR alpha