16 research outputs found

    Similarities and differences in the lifestyles of populations using mode 3 technology in North Africa and the south of the Iberian Peninsula

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    In the geohistorical region of the Strait of Gibraltar, which includes the south of the Iberian Peninsula and North Africa, important research has been carried out in recent years. This research has allowed us to document the presence of human groups as early as the Middle Pleistocene. Classical anthropology refers to these groups using various terms Homo Neanderthalensis in the south of Europe and Homo sapiens sapiens in North Africa). The current records exhibit important similarities concerning lithic technology (the so-called ‘Mode 3’, ‘Mousterian’ or ‘Middle Stone Age’), and the exploitation of marine resources. From an anthropological or cultural perspective, both groups were hunter-gatherers with similar lifestyles. Bearing these similarities in mind, three hypotheses are here presented

    Rab protein evolution and the history of the eukaryotic endomembrane system

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    Spectacular increases in the quantity of sequence data genome have facilitated major advances in eukaryotic comparative genomics. By exploiting homology with classical model organisms, this makes possible predictions of pathways and cellular functions currently impossible to address in intractable organisms. Echoing realization that core metabolic processes were established very early following evolution of life on earth, it is now emerging that many eukaryotic cellular features, including the endomembrane system, are ancient and organized around near-universal principles. Rab proteins are key mediators of vesicle transport and specificity, and via the presence of multiple paralogues, alterations in interaction specificity and modification of pathways, contribute greatly to the evolution of complexity of membrane transport. Understanding system-level contributions of Rab proteins to evolutionary history provides insight into the multiple processes sculpting cellular transport pathways and the exciting challenges that we face in delving further into the origins of membrane trafficking specificity
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