String and sealing wax.
D003198:Computer Simulation / Q000266:history; D004247:DNA / Q000737:chemistry / Q000266:history; D049673:History, 20th Century; D008958:Models, Molecular; D008961:Models, Structural; D009211:Myoglobin / Q000737:chemistry / Q000266:history; D009690:Nucleic Acid Conformation; D010455:Peptides / Q000737:chemistry / Q000266:history; D017433:Protein Structure, Secondary; D012106:Research / Q000266:history; D012984:Software / Q000266:history
D009211:Myoglobin; D010455:Peptides; D004247:DNA