SLC17A7 and Respiratory insufficiency: VGLUT1-knockout mice (VGLUT1-KO) die after weaning (Fremeau et al., 2004b; Wojcik et al., 2004) while VGLUT2-KO die immediately after birth from respiratory insufficiency (Moechars et al., 2006; Wallen-Mackenzie et al., 2006).