The fusion combines two complementary properties: B cells provide the capacity to produce antibodies against the target antigen, while myeloma cells contribute immortality. The resulting hybrid cells can therefore continue growing while producing antibody. This pairing is central to obtaining a stable, renewable source rather than relying on short-lived antibody-producing cells.
Polyethylene glycol promotes fusion between antibody-producing spleen cells and myeloma cells. Its role is to bring the two cell types together so hybrid cells can form, creating the cellular basis for subsequent selection. Fusion efficiency influences how many candidate hybridomas become available for screening and eventual isolation.
HAT medium provides a selection step that enriches for hybrid cells after fusion. Because the fusion mixture contains more than the desired hybrids, selection narrows the population before antibody testing. Researchers then screen the surviving cultures for production of an antibody with the required specificity, separating selection from functional identification.
Screening determines whether a surviving culture produces an antibody that recognizes the desired target, while cloning helps establish a line derived from a single selected hybrid cell. Using both steps improves confidence that the resulting hybridoma has the intended specificity and can provide a consistent antibody source for later experiments.
The workflow begins with immunization using the target antigen, followed by isolation of antibody-producing B cells from the spleen. These cells are fused with myeloma cells using polyethylene glycol, and the fusion products are placed in HAT medium. Surviving cultures are screened for desired specificity and cloned to identify suitable lines.
Selected hybridomas provide consistent antibodies for pathogen detection, antigen characterization, and diagnostic assay development. They also support studies of immune recognition by allowing investigators to examine interactions with a defined target. Because the cell line is renewable, experiments can use antibody produced from the same selected source over time.