Sequence length distributions
For comparing the lengths of the sequence entries in the ExED, histograms and boxplots were created with MATLAB to visualize frequency distributions and to identify possibly fragmented or artificial sequences (version R2019a, The Mathworks, Natick, MA, USA version 2019a, Statistics and Machine Learning Toolbox version 11.5). The whisker length in a boxplot was chosen as 1.5 times the interquartile range.