Figure 5. Representative experimental data for a 12 kb DNA molecule exhibiting non-normal distributions in axial position.
Top) Positive skew at low force (
) corresponds to a mismeasurement of 
in extension/
. Middle) Negative skew at medium force (
) corresponds to a mismeasurement of 
. Bottom) No skew at high force (
). The inset log-linear zooms display the same data and more clearly show the large discrepancy of the data from a normal distribution, indicating that the skew normal distribution is a much better fit.