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Re-evaluation of plant sulpholipid labelling from UDP-[14C]glucose in pea chloroplasts
1School of Biosciences, Cardiff University, Cardiff CF1 3US, U.K.
Abstract:
The sulphoquinovosyldiacylglycerol (sulpholipid) zone obtained by TLC of pea chloroplast lipids yields, on hydrolysis, not only sulphoquinovose but also galactose and glucose. Following incorporation from UDP-[(14)C]glucose, the percentages of the total radioactivity in these three sugars were typically 1, 5 and 85%, respectively. The occurrence of the glucolipid causes difficulties in elucidating further the biosynthetic pathway for sulphoquinovose.
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