immunoassays work like this:
an antibody is attached to a assay plate a small amount of sample, like blood is placed into the plate and washed with distilled water then after a a color reaction procedure is next, a color reagaent is placed on the washed sample then washed again with distilled water if the color retains then the sample is positive,if not then it is negative....
medecinal chemistry?uhm i think what your trying to say is diagnostic chemistry not medecinal chemistry...