About the Authors

Catherine Guenther

Contributed equally to this work with: Catherine Guenther, Luiz Pantalena-Filho

Affiliations Department of Developmental Biology, Stanford University School of Medicine, Stanford, California, United States of America, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America

Luiz Pantalena-Filho

Contributed equally to this work with: Catherine Guenther, Luiz Pantalena-Filho

Affiliations Department of Developmental Biology, Stanford University School of Medicine, Stanford, California, United States of America, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America

David M. Kingsley

kingsley@cmgm.stanford.edu

Affiliations Department of Developmental Biology, Stanford University School of Medicine, Stanford, California, United States of America, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CG DMK. Analyzed the data: CG LPF DMK. Wrote the paper: DMK. Discovered the complementary rib and nose expression subdomains, proposed the connection to somites, and carried out the transgenic, expression, mutant comparisons, and marker gene analysis in Figures 1–4 and Figures S1, S2, S3, S4: CG. Tested the effects of local expression on rib morphology with BmprIb constructs, and identified and measured the endogenous deposition and resorption patterns in different rib domains in Figures 5 and 6 and assisted with the regulatory survey in Figure S1: LPF. Significant contributions to the writing of the paper: CG LPF.