nicotinate(out) + Na(+)(out) => nicotinate(in) + Na(+)(in)
nicotinate(out) + na(+)(out) => nicotinate(in) + na(+)(in)
nicotinate(out) + Na(+)(out) => nicotinate(in) + Na(+)(in)
nicotinate(out) + na(+)(out) => nicotinate(in) + na(+)(in)