11889
Similar arrays of functionally important NF-kappaB/NFAT and Ets binding sites are present in the transcriptional enhancers of human immunodeficiency viruses types 1 and 2 ( HIV-1 and HIV-2 ), suggesting that this pattern of nuclear protein binding sites reflects an evolutionarily conserved mechanism for regulating inducible T-cell gene expression that has been co-opted during HIV evolution .
 DNA: transcriptional enhancers; DNA: nuclear protein binding sites
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: transcriptional enhancers, nuclear protein binding sites 
Answer:
 DNA: transcriptional enhancers; DNA: nuclear protein binding sites