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https://elifesciences.org/articles/92120 Growth inhibitory factor/metallothionein-3 is a sulfane sulfur-binding protein | eLife The hold-and-release regulation of zinc by GIF/MT-3 is mediated by sulfane sulfur through a redox-dependent switching mechanism. growth inhibitory factormetallothionein 3 https://elifesciences.org/reviewed-preprints/92120v1 Growth inhibitory factor/metallothionein-3 is a sulfane sulfur-binding protein growth inhibitory factormetallothionein 3