Tags: Protein.
Importin subunit beta-1 is a protein that in humans is encoded by the KPNB1 gene.Nucleocytoplasmic transport a signal- and energy-dependent process takes place through nuclear pore complexes embedded in the nuclear envelope. The import of proteins containing a classical nuclear localization signal (NLS) requires the NLS import receptor a heterodimer of importin alpha and beta subunits. Each of these subunits are part of the karyopherin family of proteins.