22.4 The spliceosome contains SnRNAS SCRNA is any one of several small cytoplasmic RNA molecules present in the cytoplasm and (sometimes) nucleus SnRNA(small nuclear RNa) is any one of many small RNA species confined to the nucleus several of the snrnas are involved in splicing or other rna processing reactions 消当scRNA is any one of several small cytoplasmic RNA molecules present in the cytoplasm and (sometimes) nucleus. snRNA (small nuclear RNA) is any one of many small RNA species confined to the nucleus; several of the snRNAs are involved in splicing or other RNA processing reactions. 22.4 The spliceosome contains snRNAs