12069
Site - directed mutagenesis of CAR revealed that CAR residues Leu73 and Lys121 and / or Lys123 are critical contact residues , with Tyr80 and Tyr83 being peripherally involved in the binding interaction with the Ad5 , Ad9 , Ad12 , and Ad41L fiber knobs .
 CAR, CAR, Ad5 , Ad9 , Ad12 , and Ad41L fiber knobs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CAR, CAR, Ad5 , Ad9 , Ad12 , and Ad41L fiber knobs