4116
The recognition of both the POU domain and the octamer sequence by OCA-B provides a mechanism for differential regulation of octamer sites containing genes by the ubiquitous factor Oct-1 .
 protein: Oct-1; protein: OCA-B; DNA: octamer sequence; DNA: octamer sites; protein: ubiquitous factor; DNA: POU domain
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, OCA-B, octamer sequence, octamer sites, ubiquitous factor, POU domain 
Answer:
 protein: Oct-1; protein: OCA-B; DNA: octamer sequence; DNA: octamer sites; protein: ubiquitous factor; DNA: POU domain