452
Isolation and sequencing of the first exon and 5'-flanking region of this gene reveal a TATA-less promoter with a high G + C content .
 DNA: first exon; DNA: 5'-flanking region; DNA: TATA-less promoter
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: first exon, 5'-flanking region, TATA-less promoter 
Answer:
 DNA: first exon; DNA: 5'-flanking region; DNA: TATA-less promoter