3726
Interstitial deletion constitutes the major mechanism for loss of heterozygosity on chromosome 20q in polycythemia vera .
 DNA: chromosome 20q
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: chromosome 20q 
Answer:
 DNA: chromosome 20q