1. Schools of Materials Science
and Engineering and Biological Sciences, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
2. Materials Research Laboratory, University of California, Santa Barbara, California
93106-5050, United States
3. Wyss Institute for Biologically
Inspired Engineering, Harvard University, Cambridge, Massachusetts 02138, United States
4. Marine Science Institute and Department
of Molecular, Cell, and Development Biology, University of California, Santa Barbara,
California 931066-5050, United States