Homology modelling of TKTL1 and TKTL2 using transketolase (TKT) as template revealed that both could assume a folded structure like TKT. TKTL1/2 presented a cleft of suitable dimensions between the homodimer surfaces that could accommodate the co-factor-substrate. An appropriate cavity and a hydrophobic nodule were also present in TKTL1/2 and implicated in aminopyrimidine and thiazole ring binding in TKT respectively.
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