renature
/ˌriːˈneɪtʃə/Chiefly Biochemistry
verb
1 [with object] To restore the nature or properties of (a substance that has been denatured, especially a protein or nucleic acid). Chiefly in pass.
2 [no object] To undergo renaturation.
Origin
Early 20th century; earliest use found in Harper's Magazine. From re- + nature, after denature and perhaps also renatured, renaturation, and French renaturer.