Interrogation of the Taylor et al. dataset [16] revealed that in clinical PCa samples ST6GalNAc1 exon 2 is expressed at similar levels to other exons in the ST6GalNAc1 gene (Supplementary Figure 6), suggesting that it is also the short isoform of ST6GalNAc1 that is expressed in PCa tumours. This evidence concerns the gene ST6GALNAC1 and posterior cortical atrophy.