D-mannonate + NAD(+) <=> D-mannuronate + NADH + H(+)
d-mannonate + nad(+) <=> d-mannuronate + nadh + h(+)
D-mannonate + NAD(+) <=> D-mannuronate + NADH + H(+)
d-mannonate + nad(+) <=> d-mannuronate + nadh + h(+)