Importantly, SLC6A20, in addition to SLC6A5 (GlyT2), has been implicated in schizophrenia in recent exome‐sequencing studies (Purcell et al, 2014) (see also http://atgu.mgh.harvard.edu/~spurcell/genebook/genebook.cgi?user=guest&cmd=overview). Here, SLC6A20 is linked to schizophrenia.