PFKFB3 and breast cancer: Finally, we investigated the autophagic state of these same human breast cancer tissues by IHC staining for the autophagy mediators p62/SQSTM1 (Supplementary Fig. 4a, b), LC3 (Supplementary Fig. 4c, d), and Atg3 (Supplementary Fig. 4e, f), whose expression was compared with that of Pfkfb3 (Fig. 5k).