1340
The interaction of the Oct2 transcription factor with the cognate octamer motif ATGCAAAT is a critical determinant of the lymphoid-specific expression of immunoglobulin genes .
 DNA: immunoglobulin genes; protein: Oct2 transcription factor; DNA: cognate octamer motif
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: immunoglobulin genes; protein: Oct2 transcription factor; DNA: cognate octamer motif