James V J, McConnell J F, Amemiya Y
School of Physics, University of New South Wales, Kensington, Australia.
Biochim Biophys Acta. 1993 Oct 6;1202(2):305-8. doi: 10.1016/0167-4838(93)90020-r.
A low-angle X-ray diffraction study of skin and breast-duct collagen, using synchrotron radiation, has disclosed an equatorial periodicity, common to all specimens, of about 350 nm. Tendons did not show any such periodicity, indicating that this phenomenon is restricted to two-dimensional distributions. In addition, shorter equatorial periodicities were also in evidence, which were in most instances different for different specimens, occurring in the range of 40 to 140 nm. Electron micrographs suggest the possibility that the first periodicity could be linked with blocks of the collagen molecule, which has a length of about 300 nm. The shorter periodicities give the tissue specific interfibrillar lateral packing of the individual collagen microfibrils.
利用同步辐射对皮肤和乳腺导管胶原蛋白进行的低角度X射线衍射研究发现，所有标本都具有约350纳米的赤道周期性。肌腱未显示出任何此类周期性，这表明该现象仅限于二维分布。此外，较短的赤道周期性也很明显，在大多数情况下，不同标本的周期性不同，范围在40至140纳米之间。电子显微镜照片表明，第一种周期性可能与长度约为300纳米的胶原蛋白分子块有关。较短的周期性赋予组织中单个胶原微纤维特定的纤维间侧向堆积。
