The invention provides a method of diagnosing, prognosing, staging, andor monitoring a mammalian amyloidogenic disorder or a predisposition thereto by detecting a protein or polypeptide aggregate in the cortical andor supranuclear regions of an ocular lens of the mammal. The upward terminal connector and the sideward terminal connector are electrically connected to the control arrangement. The method further includes delivering the dilute vapor comprising hydrogen peroxide to a critical process or application. Soluble fragments comprising PDGF receptor sequences are also provided, including important intracellular kinase insert sequences which interact with intracellular proteins.