9723
Although subtle gene movements within those defined topographical regions cannot be excluded by this study, the results indicate that tissue specificity of gene expression is not accompanied by drastic changes in gene nuclear topography , rather suggesting that gene organization within the nucleus may be primarily dependent on structural constraints imposed on the respective chromosomes .
 DNA: chromosomes
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: chromosomes 
Answer:
 DNA: chromosomes