Homocystinuria-Megaloblastic Anemia, Cblg Complementation Type, also known as methylcobalamin deficiency, cblg type, is related to homocystinuria without methylmalonic aciduria and homocystinuria-megaloblastic anemia, cble complementation type, and has symptoms including seizures An important gene associated with Homocystinuria-Megaloblastic Anemia, Cblg Complementation Type is MTR (5-Methyltetrahydrofolate-Homocysteine Methyltransferase). Affiliated tissues include breast, and related phenotypes are nystagmus and blindness