12011
The expression patterns suggest that RBTN-2 normally interacts equally with elf-2a and elf-2b .
 RBTN-2, elf-2a, elf-2b
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 RBTN-2, elf-2a, elf-2b