Observing Noncovalent Interactions in Experimental Electron Density for Macromolecular Systems: A Novel Perspective for Protein-Ligand Interaction Research. - Kang Ding; Shiqiu Yin; Zhongwei Li; Shiju Jiang; Yang Yang; Wenbiao Zhou; Yingsheng J. Zhang; Bo Huang (J. Chem. Inf. Model., 2022)