Ho latela DNA base complementary pairing principle, ETV6 orange-red probe le ETV6 green probe li ile tsa sebelisoa ho kopanya ka tatellano ea sepheo sa DNA khubung, 'me tlhahisoleseding ea boemo ba liphatsa tsa lefutso khubung e ile ea hlokomeloa le ho hlahlojoa ka tlas'a microscope ea fluorescence.