hnrna Eucaryotic rNa Pol Il transcribes a variety of different genes, from snrna genes of 60-300nt to the large antennapedia genes, whose genes can be over 100kb in length. The collection of these products is referred to as heterogeneous nuclear rna (hnRNA) Bi pre- mRNAs These hnrNa are processed to e mRNAs called pre-mRNAS.一、hnRNA Eucaryotic RNA Pol II transcribes a variety of different genes, from snRNA genes of 60-300nt to the large Antennapedia genes, whose genes can be over 100kb in length. The collection of these products is referred to as heterogeneous nuclear RNA (hnRNA) . 二、pre-mRNAs These hnRNA are processed to give mRNAs called pre-mRNAs