PPT1 and infantile neuronal ceroid lipofuscinosis: Infantile neuronal ceroid lipofuscinosis (INCL), a childhood neurodegenerative disease, results from mutations in the CLN1 gene encoding the lysosomal enzyme, palmitoyl‐protein thioesterase 1 (PPT1) [Biochim Biophys Acta 1832 (2013) 1806, Hum Mutat (2012) 63, Biochim Biophys Acta 1832 (2013) 1881].