sentence: The interactions of each gene / protein shown in Figures 15 and 16 were summarized in greater detail in the Results section , together with supporting references.Epithelial terminal differentiation requires a cleaved form of PRSS8 / prostasin ( r = 0.83 ) , the production of which depends in turn on a cleaved form of ST14 / matriptase ( r = 0.89 ) ( Figure 15 ) .