The functional O-mannose glycan on α-dystroglycan contains a phospho-ribitol primed for matriglycan addition oleh Jeremy L Praissman, Tobias Willer, M Osman Sheikh, Ants Toi, David Chitayat, Yung-Yao Lin, Hane Lee, Stephanie H Stalnaker, Shuo Wang, Pradeep Kumar Prabhakar, Stanley F Nelson, Derek L Stemple, Steven A Moore, Kelley W Moremen, Kevin P Campbell, Lance Wells