A four-helical super-secondary structure.
D001665:Binding Sites; D006422:Hemerythrin; D046911:Macromolecular Substances; D008961:Models, Structural; D011485:Protein Binding; D011487:Protein Conformation; D012313:RNA; D014027:Tobacco Mosaic Virus; D014448:Tyrosine-tRNA Ligase; D014764:Viral Proteins
D006422:Hemerythrin; D046911:Macromolecular Substances; D014764:Viral Proteins; D012313:RNA; D014448:Tyrosine-tRNA Ligase