  In theories with an infinite extra dimension, free particles localized on the
brane can leak out to the extra space. We argue that if there were color
confinement in the bulk, electrons would be more able to escape than quarks and
than protons (which are composed states). Thus, this process generates an
electric charge asymmetry on brane matter densities. A primordial charge
asymmetry during Big Bang Nucleosynthesis era is predicted. We use current
bounds on this and on electron disappearance to constrain the parameter space
of these models. Although the generated asymmetry is generically small, it
could be particularly enhanced on large densities as in astrophysical objects,
like massive stars. We suggest the possibility that such accumulation of charge
may be linked, upon supernova collapse, to the formation of a charged Black
Hole and the generation of Gamma-Ray Bursts.
