Enables the transport of L-aspartate and fumarate across a membrane according to the reaction L-aspartate (out) + fumarate (in) = L-aspartate (in) + fumarate (out).
L-histidine:histamine antiporter activity
L-lysine:L-arginine antiporter activity
lysine:cadaverine antiporter activity
metal cation:monoatomic cation antiporter activity +
monoamine:proton antiporter activity
monoatomic ion antiporter activity involved in regulation of postsynaptic membrane potential
monoatomic ion antiporter activity involved in regulation of presynaptic membrane potential