The CD3epsilon (E4T1B) XP ® Rabbit mAb (Alexa Fluor ® 555 Conjugate) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to CD3E. This antibody recognizes Mouse antigen. The CD3epsilon (E4T1B) XP ® Rabbit mAb (Alexa Fluor ® 555 Conjugate) Antibody has been shown to work in the following applications: Immunohistochemistry, and Immunohistochemistry - fixed.