MYC and breast ductal adenocarcinoma: In order to investigate the role of POGLUT1 in tumor cell proliferation, a recombinant, Myc-labeled retroviral vector, babe-puro-POGLUT1-Myc, was constructed and transduced into BT474 human breast ductal adenocarcinoma cells to induce exogenous POGLUT1 overexpression.