The six Hevylite assays are fully automated for the quantification of individual heavy + light chain isotypes in serum: IgGκ, IgGλ, IgAκ, IgAλ, IgMκ, and IgMλ...Hevylite assays can identify plasma cell clonality by calculating the heavy + light chain (HLC) ratio...Hevylite assays uniquely measure both the involved and uninvolved immunoglobulin.