Anti-GC1QBP antibodies are used in antigen-specific immunodetection in biological samples. The target GC1QBP is a known alias name of the protein complement C1q binding protein, encoded by the C1QBP gene in humans. This 282-amino acid residue protein is known to be involved in the apoptotic pathway and immune response pathways, among other biological processes. It is localized to the cell membrane, nucleus, mitochondria, cytoplasm, and is secreted of the cell. In terms of tissue expression, it is noted to be expressed on cell surface of peripheral blood cells; Surface expression is reported for macrophages and monocyte-derived dendritic cells. Other synonyms for GC1QBP include COXPD33 and HABP1.