aminotransferase

The story

1. Egyptianjmn
2. Ancient GreekᾸ̓́μμων (Ắmmōn)
3. LatinAmmōn
4. Latinammoniacus
5. Englishammonia
6. Englishamine
7. Englishamino-
8. Englishamino
9. Proto-Indo-European*terh₂-
10. Proto-Indo-European*térh₂t
11. Proto-Indo-European*tr̥h₂ónts
12. Proto-Indo-European*tr̥h₂n̥ts
13. Proto-Italic*trāns
14. Proto-Italic*trāns-
15. Latintrāns-
16. Proto-Indo-European*bʰer-
17. Proto-Indo-European*bʰéreti
18. Proto-Italic*ferō
19. Latinferō
20. Latintrānsferō
21. Englishtransfer
22. Proto-Indo-European*dwóh₁
23. Proto-Indo-European*trísinflu.
24. Proto-Indo-European*dwís
25. Ancient Greekδιά (diá)
26. Ancient Greekδῐᾰ- (dĭă-)
27. Proto-Indo-European*steh₂-
28. Proto-Indo-European*stísteh₂ti
29. Proto-Hellenic*hístāmi
30. Ancient Greekῐ̔́στημῐ (hĭ́stēmĭ)
31. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
32. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
33. Englishdiastase
34. Englishtransferase
35. English todayaminotransferase

From amino + transferase.