X ray crystallography 33 Crystallography, X-Ray 22 chemistry 19 Article 10 X-ray crystallography 10 Models, Molecular 9 crystal structure 9 molecular model 9 Ligands 8 ligand 8 metabolism 8 human 7 Humans 6 Proteins 6 controlled study 6 crystallography 6 Animals 5 X ray diffraction 5 animal 5 binding site 5 catalysis 5 genetics 5 molecular docking 5 nonhuman 5 protein stability 5 protein structure 5 Crystal structure 4 QD Chemistry 4 amino acid sequence 4 hydrogen bond 4