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In light of the evidence showing physical and functional interactions between Oct factors and OCA-B , we propose a mechanism of action for OCA-B and discuss the implications of OCA-B for the transcriptional regulation of other tissue-specific promoters .
 protein: Oct factors; protein: OCA-B; DNA: tissue-specific promoters; protein: OCA-B; protein: OCA-B
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:
 protein: Oct factors; protein: OCA-B; DNA: tissue-specific promoters; protein: OCA-B; protein: OCA-B