Figure 3B. Copyright: This image is from Oh SP; Seki T; Goss KA; Imamura T; Yi Y; Donahoe PK; Li L; Miyazono K; ten Dijke P; Kim S; Li E, Proc Natl Acad Sci U S A 2000 Mar 14;97(6):2626-31. [PMID:10716993] Copyright 2000 National Academy of Sciences, U.S.A.