Abstract: A method for conferring or increasing the antigenicity of a disulfide-crosslinked protein by treating the protein with an oxidizing agent, such as periodate, having an oxidation potential sufficient to cleave disulfide linkages. Excess oxidizing agent is then inactivated by addition of a reducing agent. The resulting protein exhibits an increase in its ability to be bound by select antibodies, particularly monoclonal antibodies directed to linear peptide epitopes in the protein.

Abstract: A system for performing hip prosthesis revision surgery includes a trial femoral component having a passageway which, upon insertion in the cavity left after removal of the original prosthesis, provides guide means for drilling a channel to receive a guide wire which, upon removal of the trial femoral component, serves as guide means for progressively larger reamers.

Abstract: A method is disclosed for extraction, concentration, and bioassay measurement of the concentration of bioactive parathyroid peptides in biological or other fluids. Parathyroid peptides are extracted from the fluid by a support-antibody matrix specific to the N-terminal region. The bioassay is directed to the extracted parathyroid peptides. The volume of the medium containing the extracted parathyroid peptides and tissue, cells or tissue extracts with adenylate cyclase-coupled parathyroid hormone receptors may be chosen to be significantly less than the volume of biological or other fluid being assayed.