About the Authors

Jacobo Aguirre

Affiliation Centro de Astrobiologa, CSIC-INTA, Madrid, Spain

Javier M. Buldú

Affiliations Complex Systems Group, Universidad Rey Juan Carlos, Madrid, Spain, Laboratory of Biological Networks, Centre for Biomedical Technology, UPM-Campus de Montegancedo, Madrid, Spain

Michael Stich

Affiliation Centro de Astrobiologa, CSIC-INTA, Madrid, Spain

Susanna C. Manrubia

scmanrubia@cab.inta-csic.es

Affiliation Centro de Astrobiologa, CSIC-INTA, Madrid, Spain

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JA JMB MS SCM. Analyzed the data: JA JMB MS SCM. Wrote the paper: JA JMB MS SCM. Folded sequences and constructed RNA neutral networks: MS. Analyzed network topology: JMB. Performed the analytical calculations: JA SCM.