LYPD1 and Anxiety: The Lynx2 null mutant mouse (Lynx2KO) displays heightened fear and anxiety-like behavior across several paradigms of basal anxiety, including light–dark box, elevated plus and social interaction tests (Sherafat et al., 2021; Tekinay et al., 2009), and changes in an acoustic startle response in male Lynx2KO mice (Sherafat et al., 2021).