ELP1 and Fabry disease: Details of the FD-hESC cell line characterization and genotyping are found in S1 Supporting Information and in S1–S3 Figs. IKBKAP mRNA expression analysis (S3 Fig) in WT-hESC and FD-hESC showed, as expected, preferential expression of the mutant alternative spliced IKBKAP mRNA in FD-hESC (excluding exon 20) as found in cells and tissues of FD patients, supporting its use for this study.