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Buchanan JD Cowburn RP Jausovec AV Petit D Seem P Xiong G Atkinson D Fenton K Allwood DA Bryan MT 《Nature》2005,436(7050):475
We have found that almost all paper documents, plastic cards and product packaging contain a unique physical identity code formed from microscopic imperfections in the surface. This covert 'fingerprint' is intrinsic and virtually impossible to modify controllably. It can be rapidly read using a low-cost portable laser scanner. Most forms of document and branded-product fraud could be rendered obsolete by use of this code. 相似文献
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G Waksman D Kominos S C Robertson N Pant D Baltimore R B Birge D Cowburn H Hanafusa B J Mayer M Overduin 《Nature》1992,358(6388):646-653
Three-dimensional structures of complexes of the SH2 domain of the v-src oncogene product with two phosphotyrosyl peptides have been determined by X-ray crystallography at resolutions of 1.5 and 2.0 A, respectively. A central antiparallel beta-sheet in the structure is flanked by two alpha-helices, with peptide binding mediated by the sheet, intervening loops and one of the helices. The specific recognition of phosphotyrosine involves amino-aromatic interactions between lysine and arginine side chains and the ring system in addition to hydrogen-bonding interactions with the phosphate. 相似文献
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Optical activity of biopolymers 总被引:4,自引:0,他引:4
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