Immunoglobulin heavy/light chain (Hevylite®  HLC) assays separately quantify the different light chain types of each immunoglobulin isotype (ie IgGκ  IgGλ  IgAκ  IgAλ  IgMκ and IgMλ  Chapter 9) HLC assays are performed on routine nephelometric or turbidimetric instruments (Chapters 9 and 38)