Keratin: razlika između verzija

[[Monomer]]i keratina formiraju svežnjeve koji tvore tvrde intermedijarne filamente čvrstih [[mineral|nemineraliziranih]] tkiva [[reptili|reptila]], [[ptica]], [[vodozemci|vodozemaca]] i [[sisar]]a. Od ostalih [[biologija|bioloških tvari]], približnu [[tvrdoća|tvrdoću]] kao i keratinizirana tkiva jedino ima [[hitin]] (kod [[insekt|insekata]], naprimjer).<ref>{{cite web |title=Keratin |work=Webster's Online Dictionary |url=http://www.websters-online-dictionary.org/definitions/Keratin }}{{Mrtav|access-date=12. 9. 2015 link|datumarchive-date=Oktobar6. 20195. 2021 |archive-url=https://web.archive.org/web/20210506104913/http://www.websters-online-dictionary.org/definitions/Keratin |boturl-status=InternetArchiveBotdead }}</ref><ref>{{cite journal |author=Vincenta, Julian F. V., Wegst U. G.K. |title=Design and mechanical properties of insect cuticle |journal=Arthropod Structure & Development |volume=33 |issue=3 |pages=187–199 |date= 2004-07-01 |doi=10.1016/j.asd.2004.05.006 |url=http://biomimetic.pbworks.com/f/Design%2Band%2Bmechanical%2Bproperties%2BofVincent.pdf |format=PDF}}</ref><ref>{{cite journal |author=Tombolato L., Novitskaya E. E., Chen P. Y., Sheppard F. A., McKittrick J. |title=Microstructure, elastic properties and deformation mechanisms of horn keratin |journal=Acta Biomater |volume=6 |issue=2 |pages=319–30 |date=2010 |pmid=19577667 |doi=10.1016/j.actbio.2009.06.033 |url=http://www.rhinoresourcecenter.com/pdf_files/126/1263373670.pdf |format=PDF |access-date=12. 9. 2015 |archive-date=24. 9. 2015 |archive-url=https://web.archive.org/web/20150924113814/http://www.rhinoresourcecenter.com/pdf_files/126/1263373670.pdf |url-status=dead }}</ref>