721
When transfected into K562 cells , which express zeta-globin , comparable amounts of activity were obtained from the -557 and -417 zeta- luciferase constructs and the alpha- luciferase constructs when no enhancers or the alpha-globin locus enhancers were used.
 protein: luciferase; DNA: enhancers; DNA: alpha-globin locus enhancers; DNA: alpha- luciferase constructs; cell line: K562 cells; DNA: -557 and -417 zeta- luciferase constructs; DNA: enhancers; protein: luciferase; protein: zeta-globin
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: luciferase, enhancers, alpha-globin locus enhancers, alpha- luciferase constructs, K562 cells, -557 and -417 zeta- luciferase constructs, enhancers, luciferase, zeta-globin 
Answer:
 protein: luciferase; DNA: enhancers; DNA: alpha-globin locus enhancers; DNA: alpha- luciferase constructs; cell line: K562 cells; DNA: -557 and -417 zeta- luciferase constructs; DNA: enhancers; protein: luciferase; protein: zeta-globin