11860
Regulation of immunoglobulin heavy chain (IgH) gene expression is controlled by a B cell-specific promoter , intronic enhancer and additional B cell-specific enhancer elements identified recently in the 3' end of the IgH locus .
 DNA: intronic enhancer; DNA: B cell-specific promoter; DNA: IgH locus; DNA: immunoglobulin heavy chain (IgH) gene; DNA: B cell-specific enhancer elements
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: intronic enhancer, B cell-specific promoter, IgH locus, immunoglobulin heavy chain (IgH) gene, B cell-specific enhancer elements 
Answer:
 DNA: intronic enhancer; DNA: B cell-specific promoter; DNA: IgH locus; DNA: immunoglobulin heavy chain (IgH) gene; DNA: B cell-specific enhancer elements