Which enzyme level is tested in thiamine deficiency?: (A) PDH, (B) Pyruvate kinase, (C) Transketolase, (D) Kinase
Answer is C. Thiamine (vitamin B1) Deficiency It is assessed by Erythrocyte transketolase activity. Thiamine (Vitamin B1) is the marker for transketolase enzyme -which is involved in HMP pathway (in RBCs) Activity of Transketolase is measured (not the quantity).