Immunogen sequence: QYPVVNTNYG KIRGLRTPLP NEILGPVEQY LGVPYASPPT GERRFQPPEP PSSWTGIRNT TQFAAVCPQH LDERSLLHDM LPIWFTANLD TLMTYVQDQN EDCLYLNIYV PTEDDIHDQN SKKPVMVYIH GGSYMEGTGN MIDGS. Neuroligin-4, X linked (also known as NLGN4X, NLGN4, Neuroligin-4, and Ne