Porter T L, Eastman M P, Hagerman M E, Price L B, Shand R F
Department of Physics and Astronomy, Northern Arizona University, Flagstaff, AZ 86011, USA.
J Mol Evol. 1998 Oct;47(4):373-7. doi: 10.1007/pl00006394.
Condensation reactions of the amino acid glycine on the surface of Cu(II)-exchanged hectorite are investigated using the technique of scanning force microscopy. Prebiotic conditions are simulated using alternate wetting and heating cycles. Concentration, immobilization, and subsequent polymerization resulting in glycine oligomers are seen to occur primarily at step edges or faults in the topmost layer. Condensation reactions also occur within tiny micropores or defects in the topmost layer. These reactions are facilitated by the availability of intergallery metal cations at the step edges or pores in the surface region.
利用扫描力显微镜技术研究了甘氨酸在铜（II）交换蒙脱石表面的缩合反应。通过交替的湿润和加热循环来模拟前生物条件。可以看到甘氨酸的浓缩、固定以及随后形成甘氨酸低聚物的聚合反应主要发生在最顶层的台阶边缘或断层处。缩合反应也发生在最顶层的微小微孔或缺陷内。表面区域台阶边缘或孔隙处层间金属阳离子的存在促进了这些反应。
