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JOURNAL ARTICLE
REVIEW
Membranes and the Origin of Life: A Century of Conjecture.
Journal of Molecular Evolution 2016 December
Cells are the units of all life today, and are defined by their membranous boundaries. The membranes have multiple functions; the most obvious being that, in the absence of a boundary, the systems of functional macromolecular components of the cytosol would spill into the environment and disperse. Membranes also contain the pigments essential for photosynthesis, electron transport enzymes that pump and maintain proton gradients, the ATP synthase that uses proton gradients to produce energy for the cell, and enzymes that use ATP to maintain ion gradients essential for life. But what about the function of membranes in the first forms of cellular life? Could life have begun in the absence of membranous boundaries? In order to answer that question, this review presents a history of the key research observations that began over a century ago.
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