4862
Addition of r-hTBP-1 to U1 cells during the last 4 h of a 24 h incubation with PMA still inhibited p24 antigen production by 15%.
 protein: r-hTBP-1; cell line: U1 cells; protein: p24 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: r-hTBP-1, U1 cells, p24 antigen 
Answer:
 protein: r-hTBP-1; cell line: U1 cells; protein: p24 antigen