title: Preparation of isomorphous heavy-atom derivatives.
mesh_terms: D000596:Amino Acids; D003460:Crystallization; D006863:Hydrogen-Ion Concentration; D007553:Isotope Labeling / Q000379:methods; D007554:Isotopes; D011506:Proteins / Q000302:isolation & purification*; D013329:Structure-Activity Relationship
chemical_list: D000596:Amino Acids; D007554:Isotopes; D011506:Proteins