Anti-STIM1 (extracellular) Antibody (#ACC-063) is a highly specific antibody directed against an extracellular epitope of the human Stromal interaction molecule 1. The antibody can be used in western blot, immunocytochemistry, immunohistochemistry, and indirect flow cytometry applications. It has been designed to recognize STIM1 from human, rat, and mouse samples._x005F Anti-STIM1 (extracellular)-ATTO Fluor-550 Antibody (#ACC-063-AO) is directly labeled with an ATTO-550 fluorescent dye. ATTO dyes are characterized by strong absorption (high extinction coefficient), high fluorescence quantum yield, and high photo-stability. The ATTO-550 fluorescent label is related to the well known dye Rhodamine 6G and can be used with filters typically used to detect Rhodamine. Anti-STIM1 (extracellular)-ATTO Fluor-550 Antibody has been tested in immunocytochemistry and immunohistochemistry applications and is especially suited for experiments requiring simultaneous labeling of different markers.