J. Kanabus, D. Gibeaut, N. Carpita
May 1, 1991
Citations
0
Influential Citations
12
Citations
Quality indicators
Journal
Plant physiology
Abstract
The labeling pattern of the sugar moieties of 1-kestose after in vivo pulse labeling with (14)CO(2) was not the same as that after in vitro labeling with (14)C-sucrose. The two fructosyl residues of 1-kestose had similar specific radioactivities after in vitro synthesis, but after in vivo radiolabeling the specific radioactivity of the terminal fructosyl moiety was significantly less than the internal fructosyl moiety. Evidence is presented that the uneven specific radioactivity of in vivo radiolabeling results from enzymatic transfer of terminal fructosyl residue from 1-kestose to sucrose.