IgG1, IgG2, IgG3, IgG4, Immunoglobulin G, Immunoglobulin gamma-1, Immunoglobulin G subclass 1, Immunoglobulin gamma-2, Immunoglobulin G subclass 2, Immunoglobulin gamma-3, Immunoglobulin G subclass 3, Immunoglobulin gamma-4, Immunoglobulin G subclass 4,
The original antibody was produced by an Epstein Barr virus (EBV)-transformed B-cell line prepared from peripheral CD5+ blood lymphocytes of a Gm(a-), (x-), (b+), (g-), (f+) patient with classical rheumatoid arthritis (RA).