nitrate(in) + chloride(out) <=> nitrate(out) + chloride(in)
nitrate(in) + chloride(out) <=> nitrate(out) + chloride(in)
nitrate(in) + chloride(out) <=> nitrate(out) + chloride(in)
nitrate(in) + chloride(out) <=> nitrate(out) + chloride(in)