The G8.8 monoclonal antibody recognizes CD326/Ep-CAM (Epithelial Cell Adhesion Molecule), also known as gp40 in the mouse and by a variety of names (including GA733-2, CO17-1A, and EGP) in the human. In the mouse, Ep-CAM is a 40-42 kDa cell-surface type 1 transmembrane glycoprotein expressed on thymic epithelial cells, thymic dendritic cells, immature thymocytes, a small subset of peripheral T lymphocytes, intestinal epithelium, kidney-collecting tubule epithelium, keratinocytes, Langerhans cells and lymph node and splenic dendritic cells. Profiles of Ep-CAM expression on fetal thymocytes and on the CD4[-] CD8[-], CD4[+] CD8[+], CD4[-] CD8[+], and CD4[+] CD8[-] subsets of adult thymocytes have been published. In unrelated studies, mouse Ep-CAM mRNA was detected in tissues containing epithelial cells (kidney, stomach, intestine, lung, and thymus) and in plasma cells and plasmacytomas, but not in heart, muscle, liver, brain, spleen, B lymphomas, or pre-B lymphomas. Ep-CAM is a Ca[2+] independent homophilic adhesion molecule that is proposed to play roles in the development and normal function of epithelial tissues and in the progression of carcinomas.
The antibody was conjugated to an oligonucleotide that contains an antibody clone-specific barcode (ABC) flanked by a poly-A tail on the 3' end and a PCR handle (PCR primer binding site) on the 5' end. The ABC for this antibody was designed to be used with other BD AbSeq oligonucleotides conjugated to other antibodies. All AbSeq ABC sequences were selected in silico to be unique from human and mouse genomes, have low predicted secondary structure, and have high Hamming distance within the BD AbSeq portfolio, to allow for sequencing error correction and unique mapping. The poly-A tail of the oligonucleotide allows the ABC to be captured by the BD Rhapsody™ system. The 5' PCR handle allows for efficient sequencing library generation for Illumina sequencing platforms.
NOTE: The BD Rhapsody Single-Cell Analysis System must be used with the BD Rhapsody Express Instrument.