将生色基团(丹磺酰基团)接到小段DNA上(寡核甙酸)(P~T)_9。存在这种分子连接的情况下,人工合成的核糖核酸(RNA)按它的特定碱基顺序被氮激光辐射选择性截断。这种效应由能引起有机染料的双光子激光能无辐射转移到核糖核酸上。 The chromophore (dansyl group) was attached to a small piece of DNA (oligonucleotide) (P ~ T) _9. In the presence of such molecular linkages, synthetic RNA is selectively truncated by nitrogen laser radiation in its specific base sequence. This effect is caused by the two-photon laser capable of causing dye-to-dye transfer of the dye to the RNA.