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New England Biolabs, Inc. PhiX174 RF I DNA – 150 µg
Supplier: New England Biolabs, Inc. N3021L
This is the double-stranded, covalently closed, circular form of X174 RF I DNA (supercoiled). The molecular weight of X174 RF I is 3.50 x 10^6 daltons and it is 5,386 base pairs in length. The vast majority of the molecules are RF I, and the remainder are RF II, as determined by agarose gel electrophoresis.
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