The Ras (E4K9L) Rabbit mAb (Alexa Fluor ® 555 Conjugate) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to HRAS, and NRAS. This antibody recognizes Homo Sapiens, Human, Mouse, Rat, and Non-Human Primate antigen. The Ras (E4K9L) Rabbit mAb (Alexa Fluor ® 555 Conjugate) Antibody has been shown to work in the following applications: Immunocytochemistry, and Immunofluorescence.