The ML5 monoclonal antibody specifically binds to CD24 which is also known as CD24A, signal transducer CD24, small cell lung carcinoma cluster 4 antigen, or BA-1. CD24 is a 35-70 kDa glycophosphatidylinositol (GPI)-linked glycoprotein whose glycosylation pattern is highly variable and cell-type dependent. CD24 is expressed on neutrophils, eosinophils, dendritic cells, neural cells, epithelial cells, muscle cells, and many types of cancer cells. CD24 functions as an adhesion receptor. Several different ligands have been identified for CD24 including CD62P (P-selectin) which is expressed on activated platelets and activated endothelium. CD24 is variably expressed on all B lineage cells, except plasma cells, and can play a role in regulating the activation, proliferation or differentiation of these cells.
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.