6983
All tissues and cells studied were homozygous for the wild-type gene , and were heterozygous as well as homozygous for the codon-10-variant type .
 ( DNA: wild-type gene, None) , ( DNA: codon-10-variant type, 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: wild-type gene, None) , ( DNA: codon-10-variant type, None) 