This takes place when molecules diffuse across the cell membrane by travelling through specific transport proteins. It occurs down a concentration gradient - molecules move from an area of high to ...
In order to provide a cell with energy, these molecules have to pass across the cell membrane ... The electron transport chain in the mitochondrial membrane is not the only one that generates ...
The challenge of internalizing impermeable molecules into cells ... carriers and establishes the first set of rational design ...
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