oxalate(in) + sulfate(out) <=> oxalate(out) + sulfate(in)
oxalate(in) + sulfate(out) <=> oxalate(out) + sulfate(in)
oxalate(in) + sulfate(out) <=> oxalate(out) + sulfate(in)
oxalate(in) + sulfate(out) <=> oxalate(out) + sulfate(in)