12663
Recently, a technique of clonal analysis has been devised that takes advantage of a highly polymorphic short tandem repeat within the X-linked human androgen receptor (AR) gene , resulting in a heterozygosity rate approaching 90%.
 ( DNA: X-linked human androgen receptor (AR) gene, None) , ( DNA: short tandem repeat, 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: X-linked human androgen receptor (AR) gene, None) , ( DNA: short tandem repeat, None) 