title: Guiding endosomal maturation.
abstract: In the endocytic pathway, early endosomes are converted into late endosomes by exchange of their associated Rab GTPases. In this issue, Poteryaev et al. (2010) identify the SAND-1/Mon1 protein as a switch that shuts off the recruitment of one Rab (Rab5) and facilitates the activation of the next (Rab7).
authors.affiliation: Department of Biology/Chemistry, University of Osnabrück, Barbarastrasse 13, Osnabrück 49076, Germany.
authors.forename: Margarita
authors.initials: M
authors.lastname: Cabrera
authors.forename: Christian
authors.initials: C
authors.lastname: Ungermann