- The mouse organellar biogenesis mutant buff results from a mutation in Vps33a, a homologue of yeast vps33 and Drosophila carnation. Suzuki, T., Oiso, N., Gautam, R., Novak, E.K., Panthier, J.J., Suprabha, P.G., Vida, T., Swank, R.T., Spritz, R.A. Proc. Natl. Acad. Sci. U.S.A. (2003)