27359
In the present report , we show that Fer associates with the activated PDGFbeta receptor ( PDGFRbeta ) through multiple autophosphorylation sites , i . e . Tyr579 , Tyr581 , Tyr740 and Tyr1021 .
 Chemical: Tyr579; Chemical: Tyr581; Chemical: Tyr740; Chemical: Tyr1021
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Tyr579; Chemical: Tyr581; Chemical: Tyr740; Chemical: Tyr1021