International Journal of Molecular Sciences Article N-Glycosylation of Human R-Spondin 1 Is Required for Efficient Secretion and Stability but Not for Its Heparin Binding Ability Chiung-Fang Chang 1, Li-Sung Hsu 2,3, Chieh-Yu Weng 4, Chih-Kai Chen 4, Shu-Ying Wang 4, Yi-Hwa Chou 4, ...