The putative presence of monocarboxylate transporters SLC16A1 (MCT1) (McClelland et al., 2003) and SLC16A7 (MCT2) (McClelland et al., 2003; Valenca et al., 2015) is only based on immunoblotting of purified rat liver peroxisomes (McClelland et al., 2003) or immunocolocalisation in prostate cancer cells (Valenca et al., 2015). The gene discussed is SLC16A7; the disease is prostate carcinoma.