preferred_name: uridine(in) + H(+)(in) <=> uridine(out) + H(+)(out)
preferred_name_lc: uridine(in) + h(+)(in) <=> uridine(out) + h(+)(out)
label: uridine(in) + H(+)(in) <=> uridine(out) + H(+)(out)
label_lc: uridine(in) + h(+)(in) <=> uridine(out) + h(+)(out)