10005
Purified SR-BP retained its binding properties and migrated on SDS-polyacrylamide gel as a Mr 28,000 protein .
 ( protein: SR-BP, None) , ( protein: Mr 28,000 protein, None) , ( protein: Purified SR-BP, 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: SR-BP, None) , ( protein: Mr 28,000 protein, None) , ( protein: Purified SR-BP, None) 