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High-quality reagents to study and detect glycans with high specificity for research and clinical applications are severely lacking. Here, we structurally and functionally characterize several variable lymphocyte receptor (VLR)-based antibodies from lampreys immunized with O erythrocytes that specifically recognize the blood group H-trisaccharide type II antigen. Glycan microarray analysis and biophysical...
Histocompatibility in the basal chordate Botryllus schlosseri is controlled by the polymorphisms of a single gene: the fuhc. A polymorphic candidate receptor (fester) appeared to play roles in both initiating the reaction and discriminating between fuhc alleles. Here we report the characterization of a related protein, uncle fester. uncle fester is not polymorphic, and although coexpressed with fester,...
Allorecognition has been described in many metazoan phyla, from the sponges to the mammals. In vertebrates, allorecognition is a result of a MHC-based recognition event central to adaptive immunity. However, the origin of the adaptive immune system and the potential relationship to more primitive allorecognition systems is unclear. The colonial ascidian, Botryllus schlosseri, has been used as a model...
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