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The expression of CD4 , a marker for T-derived lymphoid cells , was not significantly different in serum-free medium .
 protein: CD4; cell type: T-derived lymphoid 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:
 protein: CD4; cell type: T-derived lymphoid cells