20451
We found that AGAP2 formed a complex with beta Arrestin1 and beta Arrestin2 , proteins that are known to regulate beta 2 - adrenergic receptor signaling and trafficking .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None