Iodide (I-) Enters and Exits (IMAGE)
Caption
Cells are treated with iodide-sensitive yellow fluorescent proteins (YFP-HEK-293T cells) which are fluorescent only in the absence of I- (A). IBS scientists observed that the addition of PB-1A channels did not interfere with the fluorescence (B), but one hour later, when they added I- (as Sodium iodide, NaI), the fluorescence was quenched (C). The NaI solution was then removed, and the fluorescence reappeared after 30 minutes, indicating that I- diffused out of the cell through the PB-1A channels (D).
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IBS
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