Updated FTP location. Whole proteome profiling and quantification was performed on an isogenic Huntington disease (IsoHD) human embryonic stem cell (hESC) allelic panel. The IsoHD hESCs harbour 30, 45, 65 and 81 CAG repeats in the first exon of HTT. Whole proteome quantification was also performed on neural progenitor cells derived from the IsoHD hESC panel.