4 Αποτελέσματα
Abscisic acid (ABA) regulation of stomatal aperture is known to involve both Ca2+-dependent and Ca2+-independent signal transduction pathways. Electrophysiological studies suggest that protein phosphorylation is involved in ABA action in guard cells. Using biochemical approaches, we identified an
We have investigated the epidermal growth factor (EGF)-stimulated tyrosine-specific protein kinase activity in quiescent cultures of diploid human fibroblasts that have a well characterized mitogenic response to EGF. We developed a method of permeabilizing cells with digitonin or other agents that
Protein I from intestinal epithelium is biochemically and immunologically related to the fibroblast 36-kDa substrate of the Rous sarcoma virus-encoded tyrosine protein kinase (Gerke and Weber (1984) EMBO J. 3, 227-233). Protein I is a Ca2+-binding protein containing two copies each of a 36- and
We have previously reported the isolation of a 35-kDa protein from A-431 cells that, in the presence of Ca2+, can serve as a substrate for the epidermal growth factor (EGF) receptor/tyrosine kinase (Fava, R.A., and Cohen, S. (1984) J. Biol. Chem. 259, 2636-2645). We now report the detection of an