Title: Specific transfer of 3H from d-[3-3H]gluconic acid into l-tartaric acid in vitaceous plants
Abstract: Transfer of 3H from D-gluconic acid, specifically labelled with 3H at C-2 or C-3 and 14C at C-1, C-2, or C-3, 4, to L(+)-tartaric acid was examined in leaves and berries of Vitis labrusca cv Delaware and in leaves of Parthenocissus quinquefolia. 3H located at C-3 of D-gluconic acid was highly conserved in this transfer, yielding a 3H/14C ratio between 3.3 and 14 in the light and between 11 and 22 in the dark. These experiments strongly suggest that a portion of the 3H present in L(+)-tartaric acid may have been transferred from D-gluconic acid to L(+)-tartaric acid, possibly via NADP[3H] through a redox process involving reduction of L-xylo-2-hexulosonate (2-keto-L-idonate). Both [3H]-tartaric acid and [14C]tartaric acid synthesized in grape leaves from D-[3-3H, 2-14C]gluconic acid, or [3-3H, 3,4-14C]gluconic acid were characterized as L(+)-chiral form exclusively, the naturally occurring from of tartaric acid.
Publication Year: 1994
Publication Date: 1994-11-01
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
Access and Citation
Cited By Count: 4
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot