The Human Leukocyte Antigen (HLA) complex is the human version of the MHC, helping the immune system distinguish the body's own proteins versus those from foreign invaders, such as viruses. Humans have three main MHC class I genes, known as HLA-A, HLA-B and HLA-C. Major histocompatibility complex (MHC) class I molecules, which are widely found on the surface of nucleated cells, function by binding peptides and displaying them on the cell surface to cytotoxic T-cells. Intracellular degradation of cytosolic proteins by the proteasome generates many of the peptides that load MHC class I molecules. MHC class I may also serve as an inhibitory ligand for natural killer (NK) cell receptors (KIR, Killer Immunoglobulin-like Receptors), which viruses may modulate expression levels for to evade immune detection. The G46-2.6 monoclonal antibody binds to a monomorphic epitope on the alpha chain of HLA-A, HLA-B and HLA-C.
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.