Figure 3. The human MIS type II receptor gene, with its 11 exons, is larger than the nine-exon type I gene.
They share several similar but not identical features, hence the different shadings, including extracellular ligand binding domains, transmembrane spanning regions and intracellular S/T kinase domains. Both types are required for MIS signaling, and mutations in the type II receptor are associated with phenotypic changes in humans.
MIS: Müllerian Inhibiting Substance; S/T: Serine/threonine.