9887
These single mutational defects in the eRF1 - eRF3 interaction became evident when either truncated protein eRF3C or C - terminally altered eRF1 proteins were used for the authentic protein , providing further support for the presence of a C - terminal interaction .
 eRF1, eRF3, eRF3C, eRF1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 eRF1, eRF3, eRF3C, eRF1