KHDRBS1 and lung cancer: Given that a higher amount of SAM68 was pulled-down by WGA from the nuclear extract of CL1-5 cells than from that of CL1-1 cells, we sought to confirm the O-GlcNAc modification on SAM68 in lung cancer cells by immunoprecipitation of SAM68 from total cell lysates of CL1-5 and A549 cells and Western analysis using anti-O-GlcNAc antibodies.