We have shown recently that cancer cells take up extracellular citrate through the pmCiC (Mycielska et al., 2015, 2018; Mycielska and Geissler, 2018), and others have shown a similar role for the Na+-coupled citrate transporter NaCT (SLC13A5) (Inoue et al., 2003; Li et al., 2017; Kopel et al., 2020). Here, SLC13A2 is linked to cancer.