Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.|Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA.