Cell Signaling Technology's Phospho-eIF2alpha (Ser51) (D9G8) XP ® Rabbit mAb (BSA and Azide Free) is a Rabbit monoclonal antibody. The Phospho-eIF2alpha (Ser51) (D9G8) XP ® Rabbit mAb (BSA and Azide Free) Antibody was generated using EIF2S1 as the antigen. It reacts with Homo Sapiens, Human, Mouse, Rat, Drosophila/Arthropod, and Non-Human Primate. This antibody has been shown to work in applications such as: Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot.