The basic endosomal recycling pathway can be modified to generate tran
scytotic vesicles, storage vesicles and synaptic vesicles. Sorting int
o synaptic vesicles requires specialized sorting information not prese
nt in the transcytotic and storage vesicle proteins. Using mutagenesis
we have distinguished the signals for rapid endocytosis and SV target
ing in synaptobrevin. Finally, we have evidence that synaptic vesicles
can be generated from an endosomal compartment in vitro.