thiolactonase

The story

1. Proto-Indo-European*dʰewh₂-der.?
2. Ancient Greekθέειον (théeion)
3. Ancient Greekθεῖον (theîon)
4. Englishthio-
5. Latinlac
6. Englishlacto-
7. GermanKeton
8. Englishketone
9. Englishlactone
10. Proto-Indo-European*dwóh₁
11. Proto-Indo-European*trísinflu.
12. Proto-Indo-European*dwís
13. Ancient Greekδιά (diá)
14. Ancient Greekδῐᾰ- (dĭă-)
15. Proto-Indo-European*steh₂-
16. Proto-Indo-European*stísteh₂ti
17. Proto-Hellenic*hístāmi
18. Ancient Greekῐ̔́στημῐ (hĭ́stēmĭ)
19. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
20. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
21. Englishdiastase
22. Englishlactonase
23. English todaythiolactonase

From thio- + lactonase.