doubt in cloning

[cloningproblem]

Hi,

i hav a Pcr product for site EcoRI and Sma I but it has got by using taq polymerase (EcoRI-cohisive site) and Pfu polymerase (Sma I-blunt site) then digest Pcr product with EcoRI and gel purified the product was ligated with vector sequencially digested with Sma I and EcoRI gel purified with good DNA concentration, however after ligation could not get any transformed colonies,

i hav this doubt that, while using Pfu tag would it removes EcoRI site of PCR product so that the ligation fails are any other incompactibility may there,

how can i do clone the EcoRI / Sma I pcr product in vector digested with Sma I and EcoRI ?

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