https://wiki.tiffa.net/w/index.php?action=history&feed=atom&title=Translations%3ACollagen%2F27%2FenTranslations:Collagen/27/en - Revision history2026-09-11T18:14:14ZRevision history for this page on the wikiMediaWiki 1.43.0https://wiki.tiffa.net/w/index.php?title=Translations:Collagen/27/en&diff=143113&oldid=prevFuzzyBot: Importing a new version from external source2024-04-22T13:55:40Z<p>Importing a new version from external source</p>
<p><b>New page</b></p><div>==Molecular structure==<br />
A single collagen molecule, tropocollagen, is used to make up larger collagen aggregates, such as fibrils. It is approximately 300&nbsp;[[nanometre|nm]] long and 1.5&nbsp;nm in diameter, and it is made up of three [[polypeptide]] strands (called alpha peptides, see step 2), each of which has the conformation of a left-handed [[helix]] – this should not be confused with the right-handed [[alpha helix]]. These three left-handed helices are twisted together into a right-handed triple helix or "super helix", a cooperative [[quaternary structure]] stabilized by many [[hydrogen bond]]s. With type I collagen and possibly all fibrillar collagens, if not all collagens, each triple-helix associates into a right-handed super-super-coil referred to as the collagen microfibril. Each microfibril is [[wikt:interdigitate|interdigitated]] with its neighboring microfibrils to a degree that might suggest they are individually unstable, although within collagen fibrils, they are so well ordered as to be crystalline.</div>FuzzyBot