9849
Although devoid of any effect by itself, a mutant p53 cooperated with Spi-1 and EpoR (R129C) to reinforce both phenotypes.
 EpoR, mutant p53, Spi-1, EpoR (R129C)
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:
 EpoR, mutant p53, Spi-1, EpoR (R129C)