1.1.1.264 5.4 - forward, oxidation reaction 670701 1.1.1.264 5.5 - 5-keto-D-gluconate reduction 285823 1.1.1.264 6.5 7.4 L-idonate formation 285824 1.1.1.264 8.5 - reverse, reduction reaction 670701 1.1.1.264 10 - D-gluconate oxidation 285823