Three patients with glycosylation deficiencies, chronically elevated transaminases, and low serum ceruloplasmin and copper, caused by mutations in the gene encoding the transmembrane protein TMEM199. Issue 4 (October 2017) - Poeta, M.; Zielinska, K.; Maccarana, M.; Mandato, C.; Ng, B.G.; Di Nuzzi, A.; D'Acunto, E.; Pierri, L.; Ecklund, E.; Freeze, H.; Vajro, P.