Transketolase is an enzyme that catalyzes the conversion of aldose and ketose sugars in the pentose phosphate pathway. Up to now have been successfully identified three types of transketolase genes (TKT, TKTL 1, and TKTL 2) and a mutation (an iternal deletion) of transketolase-like gene 1 (TKTL 1). Mutations of the the TKTL1 gene will cause the loss of number of amino acid residues on the enc…