An entire-duration immunoglobulin Grams (IgG) molecule and its own fragments step 3.dos Immunoglobulin Structure and you can Means The canonical IgG1 contains two copies of the light chain (each containing a variable domain, VL, and constant domain, CL), two copies of the heavy chain (variable domain, VH, and three constant domains, CH1, CH2, and CH3), [...]