EVOLUTION OF CATALYTIC EFFICIENCY ON TERRESTRIAL PLANETARY SURFACES DOMINATED BY UV-INDUCED REACTIVE OXIDANTS

摘要

It has been postulated that the pre-ozone ultraviolet radiation climate on the primitive (Archaen) Earth may have shared characteristics with contemporary Martian surface conditions. Yen et al. [3] recently proposed that ultraviolet (UV)-induced superoxide radical ions are responsible for the chemical reactivity of Martian soil. We examine here, a model ― first proposed by Calvin ― for the development of catalytic efficiency in catabolic enzymes containing iron, or in principle, other metallic porphyrin prosthetic groups.