5807
Immunoblotting experiments with U937 cells demonstrate that PKC-zeta is present in these cells, and its expression can be downmodulated by antisense oligonucleotides ( AO ).
 protein: PKC-zeta; cell line: U937 cells
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: PKC-zeta, U937 cells 
Answer:
 protein: PKC-zeta; cell line: U937 cells