Anti-Rap-GEP antibodies enable researchers to detect and measure the Rap-GEP antigen in biological samples. This target is a reported synonym of the RAPGEF2 gene, which encodes Rap guanine nucleotide exchange factor 2. This protein is known to function in blood vessel development, among other biological roles. The human version of Rap-GEP has a canonical amino acid length of 1499 residues and a protein mass of 167.4 kilodaltons. It is reported to be localized in the cell membrane and cytoplasm of cells. Other names for this target antigen include CNrasGEF, NRAPGEP, and PDZ-GEF1.