GAE4 (UDP-D-GLUCURONATE 4-EPIMERASE 4); catalytic. Identical to UDP-glucuronate 4-epimerase 4 (GAE4) [Arabidopsis Thaliana] (GB:O22141); similar to GAE3 (UDP-D-GLUCURONATE 4-EPIMERASE 3), catalytic [Arabidopsis thaliana] (TAIR:AT4G00110.1); similar to GAE2 (UDP-D-GLUCURONATE 4-EPIMERASE 2), catalytic [Arabidopsis thaliana] (TAIR:AT1G02000.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO24535.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO24537.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN73016.1); contains InterPro domain NAD-dependent epimerase/dehydratase; (InterPro:IPR001509); contains InterPr