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===構造タンパク質===

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~~Structural proteins confer stiffness and rigidity to otherwise-fluid biological components. Most structural proteins are~~ [[fibrous protein]]~~s; for example,~~ [[collagen]] ~~and~~ [[elastin]] ~~are critical components of~~ [[connective tissue]] ~~such as~~ [[cartilage]]~~, and~~ [[keratin]] ~~is found in hard or filamentous structures such as~~ [[hair]], [[nail (anatomy)|~~nails~~]], [[feather]]s, [[hoof|~~hooves~~]]~~, and some~~ [[animal shell]]~~s. Some~~ [[globular proteins]] ~~can also play structural functions, for example,~~ [[actin]] ~~and~~ [[tubulin]] ~~are globular and soluble as monomers, but~~ [[polymer]]~~ize to form long, stiff fibers that make up the~~ [[cytoskeleton]]~~, which allows the cell to maintain its shape and size.~~

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 ===構造タンパク質===
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+構造タンパク質は、本来は流動的な生体構成要素に硬さと剛性を与える。ほとんどの構造タンパク質は[[fibrous protein/ja|線維状タンパク質]]であり、例えば[[collagen/ja|コラーゲン]]や[[elastin/ja|エラスチン]]は[[connective tissue/ja|結合組織]]、例えば[[cartilage/ja|軟骨]]の重要な構成要素であり、[[keratin/ja|ケラチン]]は[[hair/ja|髪]]、[[nail (anatomy)/ja|爪]]、[[feather/ja|羽毛]]、[[hoof/ja|ひづめ]]、およびいくつかの[[animal shell/ja|動物の殻]]などの硬いまたは繊維状の構造に見られる。[[globular proteins/ja|球状タンパク質]]の中にも構造的な役割を果たすものがあります。例えば、[[actin/ja|アクチン]]や[[tubulin/ja|チューブリン]]は球状で単量体として可溶性であるが、[[polymer/ja|重合]]して長くて硬い繊維を形成し、[[cytoskeleton/ja|細胞骨格]]を構成し、これによって細胞はその形状とサイズを維持できる。
-Structural proteins confer stiffness and rigidity to otherwise-fluid biological components. Most structural proteins are [[fibrous protein]]s; for example, [[collagen]] and [[elastin]] are critical components of [[connective tissue]] such as [[cartilage]], and [[keratin]] is found in hard or filamentous structures such as [[hair]], [[nail (anatomy)|nails]], [[feather]]s, [[hoof|hooves]], and some [[animal shell]]s. Some [[globular proteins]] can also play structural functions, for example, [[actin]] and [[tubulin]] are globular and soluble as monomers, but [[polymer]]ize to form long, stiff fibers that make up the [[cytoskeleton]], which allows the cell to maintain its shape and size.
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