1450
Recent biochemical and genetic studies indicate that in addition to the octamer-binding proteins Oct-1 and Oct-2 , other B cell components are required for lymphoid-restricted, octamer site-mediated immunoglobulin gene promoter activity .
 protein: B cell components; protein: octamer-binding proteins; DNA: immunoglobulin gene promoter; protein: Oct-1; protein: Oct-2
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: B cell components, octamer-binding proteins, immunoglobulin gene promoter, Oct-1, Oct-2 
Answer:
 protein: B cell components; protein: octamer-binding proteins; DNA: immunoglobulin gene promoter; protein: Oct-1; protein: Oct-2