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一、胶原的结构胶原纤维为一种类结晶体(crystalloid).在电镜下呈直径0.2—100μ(通常为1—12μ)的细丝,并可见640—700(?)的同周期性横纹.自然状态的胶原用酸溶解后,便可得胶原的最小单位——溶胶原(tropcollagen).溶胶原分子长约2800—3000(?),直径约15(?),分子量为294,000—300,000,由三条分子量为100,000左右的α肽链呈螺旋状编成.目前已知α链主要有α_1和α_2两种,前者又分成四种,由此组成不同的胶原.
Collagen Structure Collagen fiber is a kind of crystalloid, which has the diameter of 0.2-100μ (usually 1-12μ) under the electron microscope and shows the same periodic stripes of 640-700 (?). The collagen in the state is dissolved in acid to obtain the tropocollagen, the smallest unit of collagen, which has a length of about 2800-3000 (?), A diameter of about 15 (?) And a molecular weight of 294,000-300,000 and consists of three The α-peptide chains with a molecular weight of about 100,000 are spirally arranged, and it is known that α-chain is mainly composed of α_1 and α_2. The former is divided into four types, thus forming different collagens.