Figure 5

Characteristics of sericins. a. Phylogenetic tree of sericin homologs based on maximum likelihood method with bootstrap replicates set as 1000. Numbers near branches indicate the bootstrap values for the given clades. The red dots at internal nodes denote where gene duplication events have occurred, supported with bootstrap value >75. b. Evolutionary events of the sericin genes. Numbers of gene duplication (shown in green after “+”) and loss (shown in red after “-”) events were inferred for each internal node as well as for the seven species. Red box represents Ser-1 and Ser-3 homologs and blue box denote Ser-2 homologs. c. Amino acid composition of Ser-1 and Ser-3 homologs. d. Amino acid composition of Ser-2 homologs.