class switching

https://doi.org/10.1351/goldbook.13010
Process by which a B cell changes the class but not specificity of a given antibody it produces, e.g., switching from an immunoglobulin M (IgM) to an immunoglobulin G (IgG) antibody.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1144 [Terms] [Paper]