(2S,3R)-2-hydroxy-3-(indol-3-yl)butanoate + NAD(+) <=> (R)-3-(indol-3-yl)-2-oxobutanoate + NADH + H(+)
(2s,3r)-2-hydroxy-3-(indol-3-yl)butanoate + nad(+) <=> (r)-3-(indol-3-yl)-2-oxobutanoate + nadh + h(+)
(2S,3R)-2-hydroxy-3-(indol-3-yl)butanoate + NAD(+) <=> (R)-3-(indol-3-yl)-2-oxobutanoate + NADH + H(+)
(2s,3r)-2-hydroxy-3-(indol-3-yl)butanoate + nad(+) <=> (r)-3-(indol-3-yl)-2-oxobutanoate + nadh + h(+)