Hi Brian;
Good question. I am giving that lecture today, it is a bio course for
non-majors. I seem to remember that in the kidney there is a transporter
that pumps Na, bicarb, in and protons out. It has been awhile since I
taught A&P. Tortora's AP should help. Good luck.
Michael
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Michael P. Kolotila, Ph.D. * e-mail: mkolotila at necc.mass.edu
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Biotechnology Program Coordinator *
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On Wed, 25 Sep 1996, Brian T. Greuel wrote:
> As I was lecturing about membrane transport in my Cell Biology class today, I
> realized that I couldn't present a single specific example of primary active
> transport (i.e. hydrolyzes ATP) that utilizes a symport mechanism to transport
> two substances across a membrane. There are, of course, several examples of
> secondary active transport that use gradients of Na+ or H+ to transport other
> molecules or ions against their concentration gradient by a symport mechanism.
> But are there examples of symports that pump two substances across the
> membrane in the same direction using the energy of ATP hydrolysis? I can't
> think of any. Might some of the ABC transporters fall into this category?
>> As for antiporters involved in primary active transport, the only one I know
> about is the Na+/K+ ATPase. Are there others?
>> Thanks in advance for your help.
>> Brian T. Greuel
> Dept. of Biology
> University of Scranton
> Scranton, PA 18510-4625
> email: greuelb1 at uofs.edu>>>>>>
