A diagnostic test kit for detecting the presence or quantity of an enzyme or enzyme inhibitor is provided. The diagnostic kit utilizes reactive complexes to facilitate the detection of the enzyme or enzyme inhibitor. The reactive complexes include a substrate joined (e.g., covalently bonded, physically...http://www.google.ca/patents/US20060057661?utm_source=gb-gplus-sharePatent US20060057661 - Magnetic enzyme detection techniques