P M van Bergen en Henegouwen

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In a number of recent studies it has been shown that in vivo part of the EGF receptor (EGFR) population is associated to the actin filament system. In this paper we demonstrate that the purified EGFR can be cosedimented with purified filamentous actin (F-actin) indicating a direct association between EGFR and actin. A truncated EGFR, previously shown not to(More)
In this paper we demonstrate that cytoskeletons isolated from A431 cells have associated with them high activities of several kinases involved in inositol lipid metabolism, such as phosphatidylinositol kinase, phosphatidylinositol phosphate kinase, and diacylglycerol kinase. In addition also phospholipase C activity was detected on isolated cytoskeletons.(More)
Many cell types display two classes of epidermal growth factor receptor (EGFR) as judged from EGF binding studies; i.e., a major class of low affinity EGFR and a minor class of high affinity EGFR. We have studied their respective contribution to the cascade of events elicited by EGF in human A431 carcinoma cells, using anti-EGFR mAb 2E9. This antibody(More)
Because the growth-associated protein B-50 (GAP-43) has been implicated in neurite outgrowth as well as in synaptic plasticity, we studied its light and electron microscopical distribution in the mouse olfactory bulb, an area of the nervous system which exhibits a high degree of synaptic plasticity. Immunofluorescent staining with monospecific(More)
B-50/GAP43, a neuron-specific phosphoprotein, is highly expressed in developing nervous tissue. Monospecific polyclonal affinity-purified B-50 antibodies were used to document the ultrastructural distribution of B-50 in the hippocampus of 90-day-old (P90) and 1-day-old (P1) rats. Double-labelling immunoprocedures were performed to compare the localization(More)
Analysis of the biogenesis of K99 fimbriae indicated that the fimbrial subunits were synthesized at the cytoplasmic membrane and accumulated in the periplasm before they appeared at the cell surface. Cells grown at 18 degrees C contained a small pool of fimbrial subunits. After a shift to 37 degrees C, the cells required about 1 h before they were able to(More)
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