11322
From this, we identified a number of variations between the sequences, two of which were determined to be associated with a 50% decrease in CAT activity .
 ( protein: CAT, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: CAT, None) 