a cytidine in mRNA + H2O + H(+) <=> a uridine in mRNA + NH4(+)
a cytidine in mrna + h2o + h(+) <=> a uridine in mrna + nh4(+)
a cytidine in mRNA + H2O + H(+) <=> a uridine in mRNA + NH4(+)
a cytidine in mrna + h2o + h(+) <=> a uridine in mrna + nh4(+)