protein import into nucleus obsolete snRNP protein import into nucleus true biological_process snRNP protein transport from cytoplasm to nucleus snRNP protein import into cell nucleus OBSOLETE. The directed movement of a small nuclear ribonucleoprotein from the cytoplasm into the nucleus, across the nuclear membrane. snRNP protein-nucleus import The reason for obsoletion is that all proteins are imported into the nucleus via the same mechanism, so the import of individual proteins should be captured with extensions or by GO-CAM models. GO:0006608