The ultra pure 97-kda recombinant single polypeptide taq dna polymerase of thermusaquaticus, expressed and purified from e.Coli. Recombinant polypeptide taq dna polymerase is ideal for standard pcr of amplification of 5kb and shorter fragment Taq dna polymerase (5u/ul)along with 10x standard taq buffer in two categories 500u and 1000u