PenB_MT3 gene, its mRNA structures, and a model of the Pen_MT3 protein secondary structure. (A) Schematic representation of the PenB_MT3 gene and its transcript. All designations are the same as in Figure 4. (B) Amino acid sequence of predicted PenB_MT3 protein. Transmembrane (tmm) and secondary structure (ss) prediction represent consensus prediction from GeneSilico metaserver; black barrels represent α-helises and white arrows represent β-sheets. Intrinsically unstructured residues (disorder) were predicted by GeneSilico MetaDisorder.