14127
In this report, it is demonstrated that Elf-1 contains a sequence motif that is highly related to the Rb binding sites of several viral oncoproteins and binds to the pocket region of Rb both in vitro and in vivo.
 protein: Rb; protein: Elf-1; protein: Rb binding sites; protein: oncoproteins
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: Rb, Elf-1, Rb binding sites, oncoproteins 
Answer:
 protein: Rb; protein: Elf-1; protein: Rb binding sites; protein: oncoproteins