Jäkel, S., Mingot, J., Schwarzmaier, P., Hartmann, E., & Görlich, D. (2001). Importins fulfil a dual function as nuclear import receptors and cytoplasmic chaperones for exposed basic domains. The EMBO Journal, 21(3), 377-386. Retrieved from http://www.nature.com/emboj/journal/v21/n3/pdf/7594258a.pdf.