All assays were performed in ABI thermal cycler (Applied Biosystems,
Foster city, CA) in a 25 ll total volume containing 1U
GoTaq Flexi DNA Polymerase (Promega, Madison, USA), 5 ll of
5X GoTaq Flexi Buffer, 200 lM each of dNTP, 1.5 mM MgCl2,
2.5 ll (0.5 ll of 20 ng/ll for each species) of total DNA.