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DNA sequence of the BES-3 and BES-6 fragments. There is a mutation in the amplified fragment of the BKV from the kidney, BK(Cin/K), and the buffy coat cells, BK(Cin/W), at positions 4298 to 4299 as compared to the BK(Dun) and BK(AS) strains. At position 4339, the buffy coat virus, BK(Cin/W), differed from the kidney virus by a G→A substitution.
