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CD38 is a leukocyte differentiation antigen that has been thought to be a phenotypic marker of different subpopulations of T- and B- lymphocytes .
 protein: CD38; protein: leukocyte differentiation antigen
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, leukocyte differentiation antigen 
Answer:
 protein: CD38; protein: leukocyte differentiation antigen