Dipstick contains antibodies to hCG . Antibodies also linked with a colorimetric reagent . These antibodies are linked with an enzyme . Sandwich is formed with hormone and two antibodies. On contact, enzyme on one antibody causes color change in the reagent linked to the other antibody.
Color change indicates positive pregnancy test .
The evolution of a revolution in disease diagnosis. C. With electron microscopy, organelles involved in storage of hormones can be located. Recombinant DNA Technology. B. Bacteria synthesize the hormone in large quantities. C. Ex. recombinant human insulin .