Cell Signaling Technology's IgM (E9U8J) XP ® Rabbit mAb (Biotinylated) is a Rabbit monoclonal antibody. The IgM (E9U8J) XP ® Rabbit mAb (Biotinylated) Antibody was generated using Ighm as the antigen. It reacts with Homo Sapiens, and Human. This antibody has been shown to work in applications such as: Western Blot.