9395
The functions of basic helix-loop-helix (bHLH) transcription factors in activating differentiation-linked gene expression and in inducing G1 cell cycle arrest are negatively regulated by members of the Id family of HLH proteins .
 protein: basic helix-loop-helix (bHLH) transcription factors; protein: transcription factors; protein: Id family of HLH proteins
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: basic helix-loop-helix (bHLH) transcription factors, transcription factors, Id family of HLH proteins 
Answer:
 protein: basic helix-loop-helix (bHLH) transcription factors; protein: transcription factors; protein: Id family of HLH proteins