In neurogenetics, Kir2.1 is used in Drosophila research to inhibit neurons, as overexpression of this channel will hyperpolarize cells.
In optogenetics, a trafficking sequence from Kir2.1 has been added to
halorhodopsin to improve its membrane localization. The resulting protein eNpHR3.0 is used in
optogenetic research to inhibit neurons with light.[11]
Expression of Kir2.1 gene in human
HEK293 cells induce a transient outward current, creating a steady
membrane potential close to the reversal potential of potassium.[12]
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Wood LS, Tsai TD, Lee KS, Vogeli G (1995). "Cloning and functional expression of a human gene, hIRK1, encoding the heart inward rectifier K+-channel". Gene. 163 (2): 313–7.
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Ashen MD, O'Rourke B, Kluge KA, et al. (1995). "Inward rectifier K+ channel from human heart and brain: cloning and stable expression in a human cell line". Am. J. Physiol. 268 (1 Pt 2): H506–11.
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Tang W, Qin CL, Yang XC (1996). "Cloning, localization, and functional expression of a human brain inward rectifier potassium channel (hIRK1)". Recept. Channels. 3 (3): 175–83.
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Rae JL, Shepard AR (1998). "Inwardly rectifying potassium channels in lens epithelium are from the IRK1 (Kir 2.1) family". Exp. Eye Res. 66 (3): 347–59.
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Jeong JS, Lee HJ, Jung JS, et al. (2001). "Characterization of inwardly rectifying K(+) conductance across the basolateral membrane of rat tracheal epithelia". Biochem. Biophys. Res. Commun. 288 (4): 914–20.
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