Figure 2

HGT genes by class. ( A ) The left panel shows a schematic representation of the HGT classes: class B and C genes have h index ≥ 30 and bitscore of the best non-metazoan blastx hit ≥ 100 (they are distinguished by h _orth , which is not shown on this figure), while class A genes must additionally have bitscore <100 for the best metazoan blastx hit. The right panel shows the scores for all genes in H. sapiens, colour-coded according to their classification (class A: red, class B: orange, class C: blue, native genes: grey). ( B ) Box-plot of the number of genes in each class, for the three main taxa analysed (Drosophila spp. Caenorhabditis spp., primates species), colour-coded according to the same scheme (class A: red, class B: orange, class C: blue).