Abstract: The invention provides methods for efficient recombinant expression, refolding, and purification of Beta-site APP cleaving enzyme (BACE) polypeptides. In various aspects, the method includes the steps of expressing a recombinant construct in bacteria, dissolving inclusion bodies with a denaturant at high pH in the presence of a reducing agent, diluting the solubilized BACE polypeptide in an aqueous solution at a temperature of about 1° C. to 15° C., and incubating the diluted sample at a temperature of about 4° C. to 15° C. until the recombinant BACE polypeptide folds into an active enzyme.

Abstract: The present invention is directed to novel substrates for Hu-Asp. More particularly, the invention provides peptide substrates and fusion polypeptide substrates comprising a ?-secretase cleavage site. Methods and compositions for making and using the peptides are disclosed.

Abstract: The invention provides methods for efficient recombinant expression, refolding, and purification of Beta-site APP cleaving enzyme (BACE) polypeptides. In various aspects, the method includes the steps of expressing a recombinant construct in bacteria, dissolving inclusion bodies with a denaturant at high pH in the presence of a reducing agent, diluting the solubilized BACE polypeptide in an aqueous solution at a temperature of about 1° C. to 15° C., and incubating the diluted sample at a temperature of about 4° C. to 15° C. until the recombinant BACE polypeptide folds into an active enzyme.

Abstract: The present invention provides a cDNA encoding a heretofore unknown enzyme termed heparanase II; constructs and recombinant host cells incorporating the cDNA; the heparanase II polypeptide encoded by the gene; antibodies to the polypeptide; and methods of making and using all of the foregoing.

Abstract: The present invention is directed to novel substrates for Hu-Asp. More particularly, the invention provides peptide substrates and fusion polypeptide substrates comprising a ?-secretase cleavage site. Methods and compositions for making and using the peptides are disclosed.

Abstract: The present invention provides the enzyme and enzymatic procedures for cleaving the ? secretase cleavage site of the APP protein and associated nucleic acids, peptides, vectors, cells and cell isolates and assays. The invention further provides a modified APP protein and associated nucleic acids, peptides, vectors, cells, and cell isolates, and assays that are particularly useful for identifying candidate therapeutics for treatment or prevention of Alzheimer's disease.

Abstract: The present invention provides the enzyme and enzymatic procedures for cleaving the ? secretase cleavage site of the APP protein and associated nucleic acids, peptides, vectors, cells and cell isolates and assays.