title: DNA conformational studies from electron microscopy. I. Excluded volume effect and structure dimensionality.
mesh_terms: D010584:Bacteriophage phi X 174; D004270:DNA, Circular / Q000648:ultrastructure; D004279:DNA, Viral / Q000648:ultrastructure*; D008854:Microscopy, Electron / Q000379:methods; D009690:Nucleic Acid Conformation
chemical_list: D004270:DNA, Circular; D004279:DNA, Viral