Antibodies with agonist or antagonist activity are widely used in functional studies to research protein activities. Leinco Technologies offers a diverse selection of monoclonal and polyclonal antibodies in a variety of reactivity species, including human, mouse, and rat, to be used in in vitro or in vivo functional assays. These assays include neutralizing (N) or blocking (B) studies. We also offer T cell depletion (Depletion) antibodies and antibodies that provide costimulatory (Costim) signals. Our functional grade antibodies are free of preservatives and tested for low endotoxin content.