The following study tested nine different MOG peptides (p1–20, p35–55, p64–80, p81–96, p99–107, p119–130, p181–195, p186–200, and p205–214) in MOGAD, AQP4+ NMO, MS, and HC, but didn't find a difference of MOG-specific T cells between any groups based on CFSE assay (122). This evidence concerns the gene AQP4 and neuromyelitis optica.