Editing Protein complex (section)

=== Obligate vs non-obligate protein complex ===
If a protein can form a stable well-folded structure on its own (without any other associated protein) ''in vivo'', then the complexes formed by such proteins are termed "non-obligate protein complexes". However, some proteins can't be found to create a stable well-folded structure alone, but can be found as a part of a protein complex which stabilizes the constituent proteins. Such protein complexes are called "obligate protein complexes".<ref name = "Amoutzias_2010">{{ cite book |vauthors=Amoutzias G, Van de Peer Y | year = 2010 | chapter = Single-Gene and Whole-Genome Duplications and the Evolution of Protein–Protein Interaction Networks. Evolutionary genomics and systems biology | pages = 413–429 | doi = 10.1002/9780470570418.ch19 | title=Evolutionary Genomics|editor-first=Gustavo|editor-last=Caetano-Anolles}}</ref>