8189
In contrast , resensitization of a sequestration - impaired beta2AR mutant ( Y326A ) was reestablished following the overexpression of either GRK2 or beta - arrestin 1 .
 beta2AR, GRK2, beta - arrestin 1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 beta2AR, GRK2, beta - arrestin 1