Na+/Ca2+-K+ exchangers (NCKX) are plasma membrane transporters that are thought to mainly mediate Ca2+ extrusion (along with K+) at the expense of the Na+ electrochemical gradient. However, because they are bidirectional, most assays have relied on measuring their activity in the reverse (Ca2+ import) mode. Herein we describe a method to control intracellular ionic conditions, and examine the forward (Ca2+ extrusion) mode of exchange of NCKX2.
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| http://dx.doi.org/10.1196/annals.1387.056 | DOI Listing |
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