14979
The E2A gene encodes transcription factors of the helix-loop-helix family that are implicated in cell-specific gene expression as part of dimeric complexes that interact with E box enhancer elements .
 protein: dimeric complexes; protein: helix-loop-helix family; protein: transcription factors; DNA: E box; DNA: E box enhancer elements; DNA: E2A gene
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: dimeric complexes, helix-loop-helix family, transcription factors, E box, E box enhancer elements, E2A gene 
Answer:
 protein: dimeric complexes; protein: helix-loop-helix family; protein: transcription factors; DNA: E box; DNA: E box enhancer elements; DNA: E2A gene