File:Main protein structure levels zh.svgFile:Main_protein_structure_levels_en.svg licensed with PD-user 2008-10-07T19:25:40Z LadyofHats 434x757 (304940 Bytes) {{Information |Description=protein structures
File:Main protein structure levels bg.svgFile:Main_protein_structure_levels_en.svg licensed with PD-user 2008-10-07T19:25:40Z LadyofHats 434x757 (304940 Bytes) {{Information |Description=protein structures