12266
Strikingly, deletion of 346 C-terminal residues augmented this activity, whereas removal of 20 additional residues abolished it.
 346 C-terminal residues
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:
 346 C-terminal residues