8182
The multiple biologic activities of retinoic acid ( RA ) are mediated through RAR and retinoid X receptor ( RXR ) nuclear receptors that interact with specific DNA target sequences as heterodimers ( RXR-RAR ) or homodimers ( RXR-RXR ).
 protein: heterodimers; protein: homodimers; protein: retinoid X receptor ( RXR ) nuclear receptors; protein: RXR-RAR; protein: RXR-RXR; protein: RXR; protein: RAR; DNA: DNA target sequences
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: heterodimers, homodimers, retinoid X receptor ( RXR ) nuclear receptors, RXR-RAR, RXR-RXR, RXR, RAR, DNA target sequences 
Answer:
 protein: heterodimers; protein: homodimers; protein: retinoid X receptor ( RXR ) nuclear receptors; protein: RXR-RAR; protein: RXR-RXR; protein: RXR; protein: RAR; DNA: DNA target sequences