The Human Complement Factor MASP3 Catalytic Domain Antibody from R&D Systems, a Bio-Techne Brand is a Mouse Monoclonal antibody to MASP1, and MBL associated serine protease 1. This antibody recognizes Homo Sapiens, Human, and Mouse antigen. The Human Complement Factor MASP3 Catalytic Domain Antibody has been shown to work in the following applications: Immunocytochemistry, and Western Blot.