preferred_name: a cytidine in mRNA + H2O + H(+) = a uridine in mRNA + NH4(+)
preferred_name_lc: a cytidine in mrna + h2o + h(+) = a uridine in mrna + nh4(+)
label: a cytidine in mRNA + H2O + H(+) = a uridine in mRNA + NH4(+)
label_lc: a cytidine in mrna + h2o + h(+) = a uridine in mrna + nh4(+)