The Complement receptor Type 2 isoform 1 /CD21.3 Antibody from MyBioSource.com is a Rabbit Polyclonal antibody to CD21, Cr2, and Miscellaneous. This antibody recognizes Human antigen. The Complement receptor Type 2 isoform 1 /CD21.3 Antibody has been shown to work in the following applications: Western Blot.