The M293 monoclonal antibody specifically recognizes the integrin ß7 chain (also known as integrin ßp), which is found in association with either of two α chains. α4ß7 (LPAM-1) is expressed on most mature lymphocytes and on small subsets of thymic and bone marrow cells; it interacts with several ligands, including VCAM-1, fibronectin, and MAdCAM-1. αIELß7 is found primarily on intestinal mucosal and intraepithelial lymphocytes (IEL), and it may be primarily involved in interactions between IEL and epithelia via recognition of E-cadherin. The epitope recognized by the mAb M293 has been mapped to the region between amino acids 387 and 542. The M293 antibody exhibits little or no activity in blocking ß7 integrin-mediated adhesion.
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.