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Features of DGR components. (a) Length distribution of RT sequences (in amino acids) (median: 177, min: 29, max: 482) and length distribution of TR/VR regions (in nucleotides) (median: 110, min: 30, max: 245), (b) Mutation bias in the TR/VR pairs. As reported, it exists a mutation bias towards adenines, with an average of 14 substitutions per sequence and a maximum value of 42
