11572
Freshly isolated monocytes constitutively expressed high levels of transcriptionally inactive p50 homodimer which decreased with time in culture in favor of the transcriptionally active p50/p65 and p50/RelB heterodimers .
 protein: transcriptionally inactive p50 homodimer; protein: p50 homodimer
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: transcriptionally inactive p50 homodimer, p50 homodimer 
Answer:
 protein: transcriptionally inactive p50 homodimer; protein: p50 homodimer