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In this study, each of the four different isoforms of WT1 was constitutively overexpressed in the leukemic cell line K562 .
 DNA: WT1; cell line: leukemic cell line K562
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: WT1, leukemic cell line K562 
Answer:
 DNA: WT1; cell line: leukemic cell line K562