Fig 2a. [doi:10.1073/pnas.072087599] Copyright: This image is from Loftus SK; Larson DM; Baxter LL; Antonellis A; Chen Y; Wu X; Jiang Y; Bittner M; Hammer JA rd; Pavan WJ, Proc Natl Acad Sci U S A 2002 Apr 2;99(7):4471-6. [PMID:11917121] Copyright 2002 National Academy of Sciences, U.S.A.