Horizontal gene transfers of protein-coding genes in N. bombycis . (A) Venn diagram showing the numbers of HGT genes between two different dataset that were identified using two different methods, the Darkhorse method and the phylogenetic method. The total number of the union of HGT genes between two dataset is 55. (B) The diagram showing the origination of those 55 HGT genes. All of them originated from prokaryotes.