Ultrafast solvation dynamics at internal sites of staphylococcal nuclease investigated by site-directed mutagenesis*
Gao Guang-Yua), Li Yua), Wang Weia), Wang Shu-Fenga), Dongping Zhongb), Gong Qi-Huanga),c)
Fig. 2. a X-ray of the crystal structure of SNase PDB:1SNO. The positions where Trp is substituted are denoted by purple sticks, i.e., positions 34, 36, 38, and 41. b Active region of SNase, shown in surface mode, where the substrate analogue, pdTp, and ligand Ca 2#cod#x002B; are inserted to demonstrate the two binding pockets, shown by sticks.