Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. yzz100@psu.edu|Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. yzz100@psu.edu|Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. yzz100@psu.edu|Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. yzz100@psu.edu