text: A myelodysplastic syndrome caused by a mutation of a transporter of this compound leads to megaloblastic anemia in Rogers syndrome.
full_question: A myelodysplastic syndrome caused by a mutation of a transporter of this compound leads to megaloblastic anemia in Rogers syndrome. Red blood cell transketolase activity can be used as a marker to indicate this compound's depletion. The "banana bag" used to treat nutritionally deficient alcoholics contains magnesium sulfate, folic acid and this compound. The first component of the pyruvate dehydrogenase complex uses a derivative of this molecule as a cofactor. This compound is given either intravenously or intramuscularly to treat a condition characterized by the triad of ataxia, confusion, and either nystagmus or opthalmoplegia. That condition caused by a deficiency of this compound can progress to anterograde or retrograde amnesia, leading to a variant of that condition named for Korsakoff. For 10 points, name this vitamin whose deficiency can lead to Wernicke's encephalopathy and beriberi.
first_sentence: A myelodysplastic syndrome caused by a mutation of a transporter of this compound leads to megaloblastic anemia in Rogers syndrome.
raw_answer: thiamine [or vitamin B1]