In the MATERIALS AND METHODS section and in Table 1 of the article "Ran GTPase Cycle and Importin alpha and beta Are Essential for Spindle Formation and Nuclear Envelope Assemble in Living Caenorhabditis elegans Embryos", by P. Askjaer, V. Galy, E. Hannak, and I.W. Mattaj, (Mol. Biol. Cell  13, 4355-4370), the C. elegans gene F59A2.1 encoding a homologue of vertebrate RanBP2 was incorrectly named npp-10
. Instead, it should read npp-9
. The authors apologize for this error.