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The
extent of SC DNA cleavage was measured from the intensities
of the bands using the UVITEC Gel Documentation System.
Due corrections were made for the low level of nicked circular
(NC) form of DNA present in the original SC DNA sample
and for the low affinity of ethidium bromide binding to SC
compared to NC and linear forms of DNA.61 The observed
error in measuring the band intensities was in the range 3-5%.


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