American andrew fire and craig mello are winners for the nobel prize in physiology or medicine for their discovery of rna interference - gene silencing by double - stranded rna 今年的諾貝爾生理學(xué)或醫(yī)學(xué)獎(jiǎng)授予美國人安德魯?法爾和克雷格?梅洛,以表彰他們發(fā)現(xiàn)了rna (核糖核酸)干擾機(jī)制。