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Luminal hydrogen sulfide (H(2)S) causes colonic pain and referred hyperalgesia in mice through activation of T-type Ca(2+) channels. To test a hypothesis that H(2)S might chelate and remove endogenous Zn(2+) that inhibits the Ca(v)3.2 isoform of T-type Ca(2+) channels, facilitating visceral nociception, we asked if intracolonic (i.col.) administration of(More)
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