phosphatidyltransferase

The story

1. Proto-Indo-European*bʰeh₂-
2. Proto-Indo-European*bʰéh₂os
3. Proto-Hellenic*pʰáwos
4. Ancient Greekφᾰ́ος (phắos)
5. Ancient Greekφῶς (phôs)
6. Proto-Indo-European*bʰer-
7. Proto-Indo-European*bʰéreti
8. Proto-Hellenic*pʰérō
9. Ancient Greekφέρω (phérō)
10. Ancient Greekφωσφόρος (phōsphóros)
11. Latinphōsphorus
12. Frenchphosphore
13. Frenchphosphate
14. Englishphosphate
15. Proto-Indo-European*dʰeh₁-
16. Englishphosphatide
17. Englishphosphatidate
18. Proto-Indo-European*swel-der.?
19. Ancient Greekῡ̔́λη (hū́lē)
20. Englishphosphatidyl
21. Proto-Indo-European*terh₂-
22. Proto-Indo-European*térh₂t
23. Proto-Indo-European*tr̥h₂ónts
24. Proto-Indo-European*tr̥h₂n̥ts
25. Proto-Italic*trāns
26. Proto-Italic*trāns-
27. Latintrāns-
28. Proto-Indo-European*bʰéreti
29. Proto-Italic*ferō
30. Latinferō
31. Latintrānsferō
32. Englishtransfer
33. Proto-Indo-European*dwóh₁
34. Proto-Indo-European*trísinflu.
35. Proto-Indo-European*dwís
36. Ancient Greekδιά (diá)
37. Ancient Greekδῐᾰ- (dĭă-)
38. Proto-Indo-European*steh₂-
39. Proto-Indo-European*stísteh₂ti
40. Proto-Hellenic*hístāmi
41. Ancient Greekῐ̔́στημῐ (hĭ́stēmĭ)
42. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
43. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
44. Englishdiastase
45. Englishtransferase
46. English todayphosphatidyltransferase

From phosphatidyl + transferase.