12716
During 15 days of treatment of K562 cells with sodium phenylacetate , we observed an increase in the cellular hemoglobin concentration with a similar increase in the expression of gamma-globin mRNA .
 ( cell line: K562 cells, None) , ( protein: hemoglobin, None) , ( RNA: gamma-globin mRNA, 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:
 ( cell line: K562 cells, None) , ( protein: hemoglobin, None) , ( RNA: gamma-globin mRNA, None) 