In the preceding chapters the assumption was implicit that the membranes of very diverse (and perhaps all) cells contain binding sites for various solutes and that it is by virtue of the movement of these binding sites from one side of the membrane to the other that most substances of biochemical interest are transported into cells. What do we actually know about the nature of these binding sites and, if they are mobile, about their movement?
KeywordsSugar Proline Lysine Pseudomonas Tryptophan
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