11246
Furthermore, the nuclear protein complexes binding the SRE motif induced in activated T cells of young and elderly subjects contained serum response factor and Elk-1 pointing toward age-related defects in the activation of transcriptional regulatory proteins distinct from c-jun/ AP-1 .
 protein: c-jun/ AP-1; protein: serum response factor; protein: nuclear protein complexes; protein: Elk-1; cell type: activated T cells; DNA: SRE motif; protein: AP-1; DNA: SRE; protein: transcriptional regulatory proteins
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: c-jun/ AP-1, serum response factor, nuclear protein complexes, Elk-1, activated T cells, SRE motif, AP-1, SRE, transcriptional regulatory proteins 
Answer:
 protein: c-jun/ AP-1; protein: serum response factor; protein: nuclear protein complexes; protein: Elk-1; cell type: activated T cells; DNA: SRE motif; protein: AP-1; DNA: SRE; protein: transcriptional regulatory proteins