cis-aconitate(out) + citrate(in) => cis-aconitate(in) + citrate(out)
cis-aconitate(out) + citrate(in) => cis-aconitate(in) + citrate(out)
cis-aconitate(out) + citrate(in) => cis-aconitate(in) + citrate(out)
cis-aconitate(out) + citrate(in) => cis-aconitate(in) + citrate(out)