Mix-n-Stain™ FITC antibody labeling kits are a revolutionary antibody labeling technology that allows you to label your antibody with fluorescein (FITC) in 30 minutes without a purification step. The labeling procedure tolerates many common buffer components and antibody stabilizers. Choose from kit sizes to label 5-20 ug, 20-50 ug, or 50-100 ug of your antibody.