21.1Introduction RNA Splicing is the process of excising the sequences in RNa that correspond to introns, so that the sequences corresponding to exons are connected into a continuous mrNA pre-mRNA heterogeneous nuclear RNA (hnRNA) hnRNP 消当RNA splicing is the process of excising the sequences in RNA that correspond to introns, so that the sequences corresponding to exons are connected into a continuous mRNA. pre-mRNA heterogeneous nuclear RNA (hnRNA). hnRNP 21.1 Introduction