During the last years spin-polarized transport became a matter of major interest [1, 2], giving rise to a eld usually called magnetoelectronics, or spintronics. Much e ort has been made in studying and producing the so-called spin-valve, where a spin-polarized current is generated. A promising system in that area is the recently grown structure of GaAs/AlAs with inclusions of Ga1 xMnxAs layers ...

The isolation of guinea-pig immunoglobulins yjG, y2G and yM are described and methods for separating the polypeptide chains of each examined. The molecular weights, extinction coefficients and carbohydrate and amino acid compositions of the immunoglobulins and their constituent chains have been analysed. The findings provide a basis for further studies attempting to relate structural difference...

Overexpression of selected peptide receptors in human tumors has been shown to represent clinically relevant targets for cancer diagnosis and therapy. Neuropeptide Y (NPY) is a peptide neurotransmitter mediating feeding behavior and vasoconstriction. It has never been shown to be involved in human cancer. We show here, using in vitro receptor autoradiography, a NPY receptor incidence of 85% in ...

Desensitization of G protein-coupled receptors (GPCRs) involves receptor phosphorylation and reduction in the number of receptors at the cell surface. The neuropeptide Y (NPY) Y(1) receptor undergoes fast desensitization. We examined agonist-induced signaling and internalization using NPY Y(1) receptors fused to green fluorescent protein (EGFP). When expressed in HEK293 cells, EGFP-hNPY Y(1) re...

The Internet is a complex mesh of networks that use a common suite (TCP/IP) of networking protocols. A key feature of the Internet is that all of these constituent networks are interconnected, thereby providing system wide communication. The magnitude and pattern of the ow of routing information directly represents the con-nectivity stability of the Internet. The NSFNET backbone network provide...

Strained silicon germanium carbon (Si1 x yGexCy or SiGeC) on silicon was oxidized using a novel photo-oxidation process. The growth rate of the oxide was investigated and found to depend heavily on the germanium and carbon concentrations. MOS capacitors were fabricated with the resulting oxide and electrical characterization was done. The SiGeC MOS capacitors proved to have high leakage current...

BACKGROUND AND PURPOSE beta-Arrestins are critical scaffold proteins that shape spatiotemporal signalling from seven transmembrane domain receptors (7TMRs). Here, we study the association between neuropeptide Y (NPY) receptors and beta-arrestin2, using bimolecular fluorescence complementation (BiFC) to directly report underlying protein-protein interactions. EXPERIMENTAL APPROACH Y1 receptors...