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A novel B cell-derived coactivator potentiates the activation of immunoglobulin promoters by octamer-binding transcription factors .
 protein: octamer-binding transcription factors; protein: novel B cell-derived coactivator; DNA: immunoglobulin promoters
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: octamer-binding transcription factors; protein: novel B cell-derived coactivator; DNA: immunoglobulin promoters