11019
The presence of this protein results in a markedly reduced thymic cellularity , although the distribution of the remaining cells is normal based on evaluation of the CD4 and CD8 cell surface antigens that are used to gauge T cell development .
 protein: cell surface antigens; protein: CD8; protein: CD4
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: cell surface antigens, CD8, CD4 
Answer:
 protein: cell surface antigens; protein: CD8; protein: CD4