At physiological concentrations, alanine transport in hepatocytes from starved rats is faster than in hepatocytes from fed rats. The degree of increase is much less than previously reported for 2-aminoisobutyrate in the same concentration range. Glutamine transport is not stimulated on starvation. This provides evidence that the transport systems for alanine and glutamine in isolated hepatocytes are controlled separately.
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Hayes et al. (1982) studied this question.