510
This enhancer is inducible in K562 human erythroleukemia cells , increasing linked gamma-globin promoter /luciferase gene expression to 170-fold over an enhancerless construct .
 DNA: enhancer; DNA: enhancerless construct; protein: /luciferase; cell line: K562 human erythroleukemia cells; DNA: gamma-globin promoter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: enhancer; DNA: enhancerless construct; protein: /luciferase; cell line: K562 human erythroleukemia cells; DNA: gamma-globin promoter