Charge regulation in the peptide Glu5–His5 as a model weak ampholyte: simulations predict deviations from ideal ionization of free aminoacids, quantitative agreement with experiments.

In a communication to the Chemical Society ~ one of us reported on the property of aminoacids to form insoluble phosphotungstates. In a later publication 2 the writers showed the degree of precipitability of aminoacids by means of phosphottmgstic acid, and stated that a separation of aminoacids may be accomplished by means of this reagent. The at tempt was made to apply the method to the study ...

Three aminoacids: proline, histidine, and lysine are used as organic additives in the hydrothermal synthesis of zeotype material AlPO 4 •1.5H 2 O-H3 (framework topology code APC). A detailed analysis factors controlling formation is performed. The role aminoacids process frameworks addressed based on comparisons crystal phase selection different synthetic recipes insights provided by FTIR gels ...

We propose a mechanism that explains in a simple and natural form the l-homochiralization of prebiotic aminoacids in a volume of water where a geothermal gradient exists. This model demands the following three assumptions: 1The process takes place in volume of water where there is a vertical thermal gradient (Fig.1). This situation is common even nowadays. For example, the subglacial lakeVostok...