5837
Transient transfection studies in HeLa cells , an E(2) receptor-negative line, suggest that E(2) inhibits TNF gene expression through an effect mediated by estrogen receptor beta ( ERbeta ).
 protein: ERbeta; protein: estrogen receptor beta; cell line: HeLa cells; protein: TNF
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: ERbeta, estrogen receptor beta, HeLa cells, TNF 
Answer:
 protein: ERbeta; protein: estrogen receptor beta; cell line: HeLa cells; protein: TNF