In humans, a form of the neuronal ceroid lipofuscinosis (neuronal ceroid lipofuscinosis 7, CLN7) is associated with pathogenic variants in MFSD8, which encodes an MFS transporter that moves small solutes (yet to be identified) across membranes [63, 64]. Here, MFSD8 is linked to late infantile neuronal ceroid lipofuscinosis.