Formación prebiótico de vesículas de ácidos grasos por estructuración disipativa
Abstract
Describimos la estructuración disipativa fotoquímica de los ácidos grasos a partir de agua saturada de CO y CO2 bajo el flujo de fotones en el región ultravioleta (UVC y UVB) prevalentes en la superficie de la Tierra durante el Arcaico. Se sugiere que su asociación en vesículas, y su posterior asociación con otras moléculas fundamentales de la vida, tales como ARN, ADN y carotenoides para formar las primeras protocélulas, se produjeron a través de la estructuración disipativa fotoquímica. Se postula que las primeras vesículas se formaron a partir de ácidos linolenicos conjugados (C18: 3n-3) y parináricos (C18: 4n-3) que dan lugar a vesículas estables a altas temperaturas (~ 85 ° C) y pH (6.0-6.5) en la superficie del océano Arcaico, resistentes a la floculación por sales divalentes, permeables a iones y pequeñas moléculas cargadas, pero impermeables a ADN y ARN corto y, más importante, altamente disipativas en el ultravioleta.
Palabras clave: ácidos grasos, vesículas, estructuración disipativa, origen de la vida, protocélulas.
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