Fig. 4. Relationship between InDel fitness and secondary structure.

Box plots of fitness values for insertions (blue) and deletions (red) are shown for the signal sequence and secondary structure elements. The central line indicates the median, and the bottom and top edges of the box indicate the 25th and 75th percentiles. The median fitness value for deletions in strands is at the 25th percentile, and therefore not visible on the plot. The whiskers extend to the most extreme data points not considered outliers, which are represented by circles. Outliers are defined as values more than 1.5 times the interquartile range away from the top or bottom of the box.