SLC9A1 and cancer: Cancer cells generally display a higher activity of the V-type H+-ATPases expressed on the plasmalemma (Sennoune et al., 2004), the Na+/H+ exchanger NHE1 (Stock and Pedersen, 2017), the monocarboxylate transporters (MCTs) (Pinheiro et al., 2012), the Na+/HCO3- cotransporters (NBCs) (Gorbatenko et al., 2014), and the membrane-associated carbonic anhydrases (CAs), such as CA II and CA IX (Mboge et al., 2018).