The process of geranylgeranylation can be catalyzed by either geranylgeranyl transferase I (GGTase I) or Rab GGTase (also GGTase II).
Rab C. Nesbitt | Geranylgeranyltransferase type 1 | Rab Butler | Rab geranylgeranyltransferase | Rab escort protein | Rab concentration camp | K-Rab | Rab Wilson | Rab | A. S. M. Abdur Rab |
Instead, Rab proteins are bound by the Rab escort protein (REP) over a more conserved region of the Rab protein and then presented to the Rab geranylgeranyltransferase.