 Another type of difference, called indels (insertions/deletions) accounted for many fewer differences (15% as many), but contributed ~1.5% of unique sequence to each genome, since each insertion or deletion can involve anywhere from one base to millions of bases.A companion paper examined segmental duplications in the two genomes, whose insertion and deletion into the genome account for much of the indel sequence.They found that a total of 2.7% of euchromatic sequence had been differentially duplicated in one or the other lineage.