14690
It was shown by transient expression assay that HS-40 behaved as an authentic enhancer for high-level zeta 2 globin promoter activity in K562 cells , an erythroid cell line of embryonic and/or fetal origin.
 DNA: enhancer; DNA: HS-40; cell line: K562 cells; DNA: zeta 2 globin promoter
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: enhancer, HS-40, K562 cells, zeta 2 globin promoter 
Answer:
 DNA: enhancer; DNA: HS-40; cell line: K562 cells; DNA: zeta 2 globin promoter