english: It's been a 15-year quest just to get to the starting point now to be able to answer those questions, because it's very difficult to eliminate multiple genes from a cell.
non_english: Bilo je to petnaestogodišnje traganje samo da bismo stigli do startne pozicije, da bismo bili u stanju da damo odgovore na ova pitanja. Veoma je teško eliminisati višestruke gene iz ćelije,