IgG is an important component of the humoral immune response, helping to control infection. IgG is produced by plasma B-cells and may be found in extracellular fluids, such as blood, lymph, peritoneal, and cerebrospinal fluids. IgG monomers consist of two light and two heavy chains containing two antigen binding sites. There are four IgG subclasses found in human, mouse and rat species, which include IgG1, IgG2, IgG3 and IgG4. The G18-145 monoclonal antibody specifically binds to the heavy chain of human immunoglobulin G subclasses: IgG1, IgG2, IgG3 and IgG4. The G18-145 antibody has been reported not to react with the heavy chains of other human immunoglobulin isotypes.
The antibody was conjugated to BD Horizon™ BB700, which is part of the BD Horizon Brilliant™ Blue family of dyes. It is a polymer-based tandem dye developed exclusively by BD Biosciences. With an excitation max of 485 nm and an emission max of 693 nm, BD Horizon BB700 can be excited by the 488 nm laser and detected in a standard PerCP-Cy™5.5 set (eg, 695/40-nm filter). This dye provides a much brighter alternative to PerCP-Cy5.5 with less cross laser excitation off the 405 nm and 355 nm lasers.