Abstract
Sorbitol-6-phosphate dehydrogenase was found in flesh tissue of mature fruit of the loquat (Eriobotrya japonica Lindl. var. Tanaka). The enzyme was purified about 30-fold from the crude extract of the fruit and catalyzed sorbitol-6-phosphate + NADP .dblarw. G-6-P + NADPH. The optimal pH values for sorbitol 6-phosphate oxidation and G-6-P reduction were 9.8 and 9.1, respectively.

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