1025
The KBF1/p50 factor binds as a homodimer but can also form heterodimers with the products of other members of the same family, like the c-rel and v-rel (proto)oncogenes .
 protein: KBF1/p50 factor; protein: heterodimers; protein: homodimer
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: KBF1/p50 factor; protein: heterodimers; protein: homodimer