This assay employs the competitive inhibition enzyme immunoassay technique. The microtiter plate provided in this kit has been pre-coated with an antibody specific to LZM. Standards or samples are added to the appropriate microtiter plate wells with Horseradish Peroxidase (HRP) conjugated LZM. The competitive inhibition reaction is launched between with HRP-conjugated LZM and LZM in samples. A substrate solution is added to the wells and the color develops in opposite to the amount of LZM in the