1 Department of Biological Chemistry, School of Medicine, University of California, Irvine, Irvine, CA 92697, USA. Electronic address: wenbiy1@uci.edu.
2 Department of Biological Chemistry, School of Medicine, University of California, Irvine, Irvine, CA 92697, USA.
3 Department of Biological Chemistry, School of Medicine, University of California, Irvine, Irvine, CA 92697, USA. Electronic address: wei.li@uci.edu.
4 Department of Biological Chemistry, School of Medicine, University of California, Irvine, Irvine, CA 92697, USA. Electronic address: yac7@uci.edu.