J A Donovan

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Surface expression of the CD45 tyrosine phosphatase is essential for the T cell antigen receptor (TCR) to couple optimally with its second messenger pathways. CD45 may be required to dephosphorylate a TCR-activated protein tyrosine kinase, which then transduces an activation signal from the TCR. A chimeric molecule that contained extracellular and(More)
D-Glucose deprivation of primary rat brain glial cell cultures, by incubation with 25 mM D-fructose for 24 h, resulted in a 4-5-fold induction of D-glucose transport activity. In contrast, 24-h D-glucose starvation of primary rat brain neuronal cultures had only a marginal effect (1.5-2-fold) on D-glucose transport activity. Northern blot analysis of total(More)
Tyrosine phosphorylation of the Cbl protooncogene has been shown to occur after engagement of a number of different receptors on hematopoietic cells. However, the mechanisms by which these receptors induce Cbl tyrosine phosphorylation are poorly understood. Here we demonstrate that engagement of the high affinity IgE receptor (Fc epsilon R1) leads to the(More)
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