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Like other enhancers , the Ig heavy chain enhancer contains several short sequence motifs that bind specific transcription factors .
 DNA: enhancers; DNA: Ig heavy chain enhancer; DNA: sequence motifs; protein: specific transcription factors
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: enhancers; DNA: Ig heavy chain enhancer; DNA: sequence motifs; protein: specific transcription factors