The Immunotag™ SPAK (phospho Ser323) Polyclonal Antibody from G Biosciences is a Rabbit Polyclonal antibody to STK39. This antibody recognizes Human, Mouse, and Rat antigen. The Immunotag™ SPAK (phospho Ser323) Polyclonal Antibody has been validated for the following applications: ELISA, Immunohistochemistry, and Immunohistochemistry - fixed.