胶原纤维结构的叶序性研究
A Phyllotactic Approach to the Structure of Collagen Fibrils
摘要：
胶原原纤维是长生物分子的索状集合体，是结缔组织的主要成分。它们决定性的形态和功能作用激发了大量关于它们的形成和结构的研究。然而，这两点仍然是悬而未决的问题，特别是，他们的组织，这当然是密集的，但不是严格的晶体。我们在这里研究如何的算法的叶序可能有助于胶原纤维的结构分析。这样的算法确实导致组织在圆柱对称的情况下为组件的每个元素提供最均匀和各向同性的密集环境。预期从叶序分布的三螺旋胶原纤维的散射强度以及同意沿赤道方向观察到的X射线图案的主要功能。按照这种方法，在纤维中的三重螺旋的聚集应被认为是软凝聚物质的研究框架内，而不是分子晶体的研究。
英文摘要：
Collagen fibrils, cable-like assemblies of long biological molecules, are dominant components of connective tissues. Their determinant morphological and functional roles motivated a large number of studies concerning their formation and structure. However, these two points are still open questions and, particularly, that of their organization which is certainly dense but not strictly that of a crystal. We examine here how the algorithm of phyllotaxis could contribute to the analysis of the structure of collagen fibrils. Such an algorithm indeed leads to organizations giving to each element of the assembly the most homogeneous and isotropic dense environment in a situation of cylindrical symmetry. The scattered intensity expected from a phyllotactic distribution of triple helices in collagen fibrils well agrees with the major features observed along the equatorial direction of their X ray patterns. Following this approach, the aggregation of triple helices in fibrils should be considered within the frame of soft condensed matter studies rather than that of molecular crystal studies.
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