from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The structure formed by the noncovalent interaction of two or more macromolecules, such as that formed by four globin protein molecules to make hemoglobin or that formed by histones interacting with DNA to make a nucleosome.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The arrangement of multiple folded or coiled proteins to form a multi-subunit complex
Sorry, no etymologies found.
The T4 ‘lunar lander’ phage also has an icosahedron for its main DNA receptacle, but its self-assembled quaternary structure is more complex, incorporating additional protein units, assembled according to different local rules, in the injection apparatus and the ‘legs’ that are attached to the icosahedron.