Editorial: Methods and advances for systems and synthetic biology, nanobiotech and medicine.

Congratulations to the winners of our cover competition. The first prize goes to the cover of the October issue, which was provided by the authors of the article "Chlorella species as hosts for genetic engineering and expression of heterologous proteins: Progress, challenge and perspective" by Bo Yang, Jin Liu, Yue Jiang and Feng Chen (http://dx.doi.