1451
Using a genetic screen in yeast, we have isolated B cell-derived cDNAs encoding Oct-binding factor 1 ( OBF-1 ), a novel protein that specifically associates with Oct-1 and Oct-2 .
 protein: Oct-1; protein: Oct-2; DNA: B cell-derived cDNAs; protein: OBF-1; protein: Oct-binding factor 1
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: Oct-1, Oct-2, B cell-derived cDNAs, OBF-1, Oct-binding factor 1 
Answer:
 protein: Oct-1; protein: Oct-2; DNA: B cell-derived cDNAs; protein: OBF-1; protein: Oct-binding factor 1