EIF2AK3 and supranuclear palsy, progressive, 1: Sequencing of the coding regions of the GWAS implicated genes in 84 PSP cases was mainly negative with the exception of a rare, predicted damaging STX6 p.C236G mutation that remains of unknown relevance [8] and the association of the EIF2AK3 haplotype B, known to be in LD with rs7571971, with the risk of PSP [9].