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Guanylyl cyclase-activating proteins (GCAPs) and recoverin are retina-specific Ca2+ -binding proteins involved in phototransduction. We provide here evidence that in spite of structural similarities GCAPs and recoverin differently change their overall hydrophobic properties in response to Ca2+ . Using native bovine GCAP1, GCAP2 and recoverin we show that: i) the Ca2+ -dependent binding of recoverin...
Sera of patients with infectious mononucleosis contain heterophile anti-Paul- Bunnell (PB) antibodies to erythrocytes of numerous mammalian species. Evidence is presented that the corresponding antigen of bovine erythrocytes is not, as previously described, a single molecule, but a series of glycoproteins with glycans terminated with .-glycolylneuraminic acid (Neu5Gc). The latter compound should...
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