The return of a denatured molecule to the original native conformation.

Renaturation is the process by which an unfolded, or denatured protein can reassume its native conformation, either by removal of the chemical reagent that denatured the protein to begin with, or by creation of a favorable environment that encourages proper folding. See also Conformation, Denaturation.

the reassociation of complementary single strands of nucleic acids into double-stranded helical forms.