The presence of carbohydrate in many plasma and tissue proteins is well established (1, 2). The glycoproteins thus far studied contain one or several oligosaccharide units linked to a peptide chain by uncharacterized linkages. Little is yet known about the biosynthetic processes by which the oligosaccharide units are assembled and attached to the polypeptide chain. In order to approach these pr...

Abbreviations: ZP, zona pellucida; ZPG, ZP glycoprotein; VE, vitelline envelope; VEG, VE glycoprotein; mZP, mouse ZP; hZP, human ZP; SS, signal sequence; CTP, C-terminal propeptide; CFCS, consensus furin cleavage-site; TMD, transmembrane domain; ZPD, ZP domain; NTS, N-terminal subdomain; CTS, C-terminal subdomain; EHP, external hydrophobic patch; IHP, internal hydrophobic patch; CP, charged pat...

The class of carbohydrate macromolecules known as glycoproteins exhibits great structural diversity. Their key role in the function of biological systems includes determination of cell membrane structure and function as well as antigenic determinants. In the recent decade, the detection of inborn errors of metabolism of these macromolecules as well as changes in their composition following muta...

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Monoclonal antibodies reactive with NIH/3T3 cell surface antigens were obtained from hybridomas of murine myeloma cells fused to spleen cells of rats immunized with NIH/3T3 cell plasma membranes. Four of the antibodies, of forty that have been studied, appeared to react with allospecific antigenic determinants: they bound to NIH/3T3 cells but not to BALB/ 3T3 cells. Each of these four antibodie...

Glycoproteins I Ib / I I Ia form a Ca2+-dependent complex that functions as the fibrinogen receptor on human platelets (1). Several reports have indicated that this fibrinogen receptor is also expressed on the surface of human monocytes (2-4). Of three monoclonal antibodies directed against platelet I Ib/ I I Ia , two were reported to give a positive reaction with monocytes as well (4). Other i...