A brief note on the study of yieldin, a wall-bound protein that regulates the yield threshold of the cell wall.
Yielding of plant-cell walls is defined by the mechanical properties of walls such as their extensibility ( Phi for in vivo, phi for in vitro cell wall) and yield threshold ( Y for in vivo, y for in vitro cell wall). A protein named yieldin, isolated from the cell wall of growing hypocotyls of Vigna unguiculata L. (cowpea), has been demonstrated to regulate the pH dependency of y in the cell wall of the glycerinated hollow cylinder of the cowpea hypocotyl. This mini-review outlines the process of the discovery of yieldin, and also refers to the progress of studies on yieldin: the molecular cloning of yieldin and its immunolocalization in the etiolated cowpea hypocotyl.
Okamoto-Nakazato
Akane
A
Biological Institute, Showa Pharmaceutical University, Higashi-tamagawagakuen 3-3165, Machida-Shi, Tokyo 194-8543, Japan, okamoto@ac.shoyaku.ac.jp