dUMP + formaldehyde + NADPH + H(+) => dTMP + NADP(+) + H2O
dump + formaldehyde + nadph + h(+) => dtmp + nadp(+) + h2o
dUMP + formaldehyde + NADPH + H(+) => dTMP + NADP(+) + H2O
dump + formaldehyde + nadph + h(+) => dtmp + nadp(+) + h2o