PRMT5 and mantle cell lymphoma: The identities of the proteins detected by the SDMA antibody were determined in Z-138 cellular lysates (the most sensitive mantle cell lymphoma cell line in a 6-day growth/death assay) from control- and PRMT5 inhibitor-treated cells by immunoprecipitation with the SDMA antibody followed by mass-spectrometric analysis (MethylscanTM).