The Gbeta5 protein is a G protein subunit present predominantly in the central nervous system. This protein appears to be expressed in two forms, one found in the brain (39 kDa) and one found in the retina (44 kDa). It has also been found that Gb5 associates tightly with RGS7, a member of the superfamily of negative regulators of G protein signaling. These complexes have been localized to most regions of the brain, whereas G 1-4 exhibit no observable colocalization with RGS7, despite their widespread codistribution throughout similar neuronal networks. This antibody is specific for a peptide sequence within the D1 blade which is not found in the GbetaÕs 1-4.
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