Power of HGT detection for in-silico gene donations using the AU-test at different significance levels. The power of detection is calculated as the percentage of gene phylogenies that were detected as significantly different from the consensus using the indicated significance levels. Each colored arc corresponds to an event where a gene is transferred from one species to another, and the existing gene was removed from the recipient. The arc is colored according to the percentage of genes that after the swap resulted in a significant conflict with the consensus. Panels A, B, C and D show results for significance levels of 10-4, 10-3, 10-2, and 0,05, respectively.