517
In this study three mutations ( a missense mutation Pro183Thr and two in - frame deletions removing residues 95 - 99 and 236 - 241 , respectively ) were unusual in being associated with expression of mutant protein .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 None