8707
We show that the molecular mechanism (s) underlying Ig gene extinction can be explained, at least in part, by a lack of transcription factors that are essential for Ig gene transcription .
 DNA: Ig gene; DNA: Ig gene; protein: transcription factors
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: Ig gene, Ig gene, transcription factors 
Answer:
 DNA: Ig gene; DNA: Ig gene; protein: transcription factors