"Quaternary structure" refers to the way multiple protein molecules come together and arrange themselves to form a functional protein complex. Full definition
The quaternary structure consists of two dyad - symmetric dimers that are nearly parallel to each other. (science.sciencemag.org)
From the in vitro reconstituted Rad3 - Rad26 complex, small - angle X-ray scattering and electron microscopic studies, it is possible to model the quaternary structure and thus bring us closer to a mechanistic understanding Rad3 - Rad26 DNA repair apparatus. (sciencedaily.com)
Contribution of electrostatic interactions, compactness and quaternary structure to protein thermostability: lessons from structural genomics of Thermotoga maritima. (jcsg.org)