Reconsideration of some results for linear and circular DNA.

A reassessment is made of some results for linear and circular DNA. The alternative side-by-side configuration is used in an analysis of situations where some doubt about current double helix based interpretations may exist. The following specific areas are considered: (i) certain linear DNA examples involving duplex interactions, (ii) nucleosome sequence data and (iii) the banding effect observed in gel electrophoresis studies of in vitro circular DNA.