Examville.com is a website that provides online practice tests, live classes, tutoring, study guides, Q&A, and premium content to help students prepare for exams. Collagen is the most abundant protein in mammals, making up about 25% of total protein content. It forms the main structure of connective tissue. Collagen has diverse structures tailored to its different functions, such as forming highly organized structures in tendons or loosely woven flexible fibers in skin. Tropocollagen molecules are composed of three polypeptide chains that form a stable triple helix structure through hydrogen bonding between chains. This triple helix structure gives collagen its great tensile strength.

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2. COLLAGEN Biochemistry

4. COLLAGEN

8. α chains coiled about each other into a right-handed triple helixes

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