SLC6A4 and NSF expression in the raphe region of post-mortem brains. Comparison of SLC6A4 (A) and NSF (B) expression levels in the raphe region of post-mortem brains from control and autistic subjects. The Mann–Whitney U test was used to compare gene expression levels between autism and control groups. Data are presented as the means ± standard error of the mean. n = 11 control and n = 7 autism. NSF, N-ethylmaleimide-sensitive factor.