FIG. 2.
The carboxyl terminus of helicase A harbors an NES. An interspecies heterokaryon assay confirmed the shuttling ability of NTD. Mouse nuclei were identified by the punctate staining by Hoechst 33258. Anti-Myc antibody detected the cotransfected Myc-NPc-TNLS. GFP was found only in transfected HeLa cell nuclei and mouse nuclei within the heterokaryons that contained transfected human cells.