ACKNOWLEDGMENT
We thank the staffs from BL18U1 beamline of National Facility for
Protein Science in Shanghai (NFPS) at Shanghai Synchrotron Radiation
Facility, for assistance during data collection. This work was supported
by grants from the National Natural Science Foundation of China
(31900435 to B.W.), and the Guangdong Science and Technology Department
(2020B1212060018 and 2020B1212030004 to B.W.).