Abstract: The present invention relates to a tritiated growth hormone secretagogue which can be used for the identification of compounds capable of binding to growth hormone secretagogue receptors, or of compounds having activity as growth hormone secretagogues.

Abstract: The present invention relates to an assay for identifying inhibitors of beta-secretases comprising the steps of immobilizing a beta-secretase protein on a solid support, contacting it with a test compound in the presence of a tagged beta-secretase inhibitor, and comparing the extent of binding of the tagged beta-secretase inhibitor in the presence and in the absence of the test compound in order to evaluate if the test compound is an inhibitor of beta-secretases. The present invention also relates to a method of screening for inhibitors of beta-secretases, to novel beta-secretase inhibitors and their use as tagged beta-secretase inhibitors for identification of inhibitors of beta-secetase, to a kit for identifying beta-secretase inhibiotrs as well as to novel beta-secretase inhibitors for use in the treatment of Alzheimer's disease and other cerebrovascular amyloidosis.