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Search for Hp141v in the Hp141 infecting inoculum by PCR with primers ppk1 and ppk4. Lanes 1 and 2, two different IS Hp141 DNA extracts; lanes 3 and 4, two different Hp141v DNA extracts; lane M, molecular weight markers. No Hp141v DNA was detected in IS Hp141 by this method. Numbers at left indicate base pairs.
