The SR84 monoclonal antibody specifically recognizes CD49a (CD49 antigen-like family member A). CD49a is a ~200 kDa type I transmembrane molecule that is encoded by ITGA1 (Integrin subunit alpha 1). CD49a is also known as very late antigen 1α subunit (VLA-1) of the integrin family of cell adhesion molecules. CD49a associates with the integrin β1 subunit (CD29) to form the α1/β1 heterodimer (CD49a/CD29), and serves as receptor for collagen and laminin-1. It is expressed on activated T cells, monocytes, neuronal cells and smooth muscle cells. CD49a has been reported to play a role in cell attachment during the development of both the central and peripheral nervous systems.
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 or other oligo-dT-based capture systems. The 5' PCR handle allows for efficient sequencing library generation for Illumina sequencing platforms.