(3R)-3-hydroxy-4-oxobutanoate + trimethylamine + NADP(+) + H2O => (R)-carnitine + NADPH + O2 + H(+)
(3r)-3-hydroxy-4-oxobutanoate + trimethylamine + nadp(+) + h2o => (r)-carnitine + nadph + o2 + h(+)
(3R)-3-hydroxy-4-oxobutanoate + trimethylamine + NADP(+) + H2O => (R)-carnitine + NADPH + O2 + H(+)
(3r)-3-hydroxy-4-oxobutanoate + trimethylamine + nadp(+) + h2o => (r)-carnitine + nadph + o2 + h(+)