NOVEL DELETION IN HYPOTONIA-CYSTINURIA SYNDROME Aydin HI 1 , Okur I 1 , Creemers JWM 2 , Coskun T 3 1 Div Metab Dis, Dep Ped, Gulhane MMF, Ankara, Turkey 2 Center for Human Genetics, Leuven, Belgium 3 Div Metab Dis, Dep Ped, Hacettepe Univ., Ankara, Turkey