antiport


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antiport

 [an´tĭ-port]
a cell membranetransport mechanism that transports two molecules at once through the membrane in opposite directions. See also countertransport and symport.
 Antiport: sodium-calcium exchanger. The electrochemical gradient of Na+ is used to pump Ca2+ out of the cell and thereby regulate the cytosolic Ca2+ level.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

an·ti·port

(an'tē-pōrt),
The coupled transport of two different molecules or ions through a membrane in opposite directions by a common carrier mechanism (antiporter). Compare: symport, uniport.
[anti- + L. porto, to carry]
Farlex Partner Medical Dictionary © Farlex 2012

an·ti·port

(an'ti-pōrt)
The coupled transport of two different molecules or ions through a membrane in opposite directions by a common carrier mechanism (antiporter).
Compare: symport, uniport
[anti- + L. porto, to carry]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

antiport

the transport of a SOLUTE across a MEMBRANE coupled to the transport of a different solute in the opposite direction.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Tsuji, "Anion antiport mechanism is involved in transport of lactic acid across intestinal epithelial brush-border membrane," Biochimica et Biophysica Acta: Biomembranes, vol.
SOS1 may be active as an antiport transporter and as ionic channel in the loading of xylem or even as a [Na.sup.+]/[H.sup.+] symport transporter in the unloading of xylem.
Therefore, the antiport crosstalk between starch and cellulose biosyntheses [36, 37, 38] is mediated by Pi translocator and glucosyltransferase via the plus/plus strands sequence homology of the GDH-synthesized RNAs that regulate the abundance of their mRNAs.
This type of transport is called: (a) cotransport (b) antiport (c) symport (d) a and b (e) duoport Answer = d 3.
Salt tolerance conferred by over expression of a vacuolar [Na.sup.+]/[H.sup.+] antiport in Arabidopsis.
If the N[O.sub.3.sup.-]-N produced is taken up in an antiport uptake exchange (Kennedy 1992) with HC[O.sub.3.sup.-] or O[H.sup.-] , then the soil pH will increase and will neutralise the acidity created by nitrification.
On the other hand, an increased rate of Na/Mg antiport in hemodialysis patients, which leads only to Mg efflux out of RBC, partially compensates for the intracellular increase [24].
Paillard, "Signaling pathways in the biphasic effect of angiotensin II on apical Na/H antiport activity in proximal tubule," Kidney International, vol.
Nitric oxide enhances salt tolerance in maize seedlings through increasing activities of proton-pump and Na+/H+ antiport in the tonoplast.
The decrease of intracellular ATP strongly penalizes all the ATP dependent pumps such as [Na.sup.+]/[K.sup.+] ATPase, [H.sup.+] ATPase, and [Na.sup.+]/[H.sup.+] antiport, that is essential for ionic stability, while its release favors the microcirculation through the paracrine action of the nucleotide on purinergic receptors of vascular epithelium and the concomitant synthesis of nitric oxide by nitric oxide synthase.
Zhang, "Nitric oxide enhances salt tolerance in maize seedlings through increasing activities of proton-pump and [Na.sup.+]/[H.sup.+] antiport in the tonoplast," Planta, vol.