14703
The L gene produces the erythroid ( R-PK ) or the hepatic ( L-PK ) isozymes by the alternative use of two promoters .
 ( DNA: L gene, None) , ( DNA: promoters, None) , ( protein: R-PK, None) , ( protein: hepatic ( L-PK ) isozymes, None) , ( protein: erythroid, None) , ( protein: L-PK, 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:
 ( DNA: L gene, None) , ( DNA: promoters, None) , ( protein: R-PK, None) , ( protein: hepatic ( L-PK ) isozymes, None) , ( protein: erythroid, None) , ( protein: L-PK, None) 