Sec12p-dependent membrane binding of the small GTP-binding protein Sar1p promotes formation of transport vesicles from the ER.
d’Enfert C, Wuestehube LJ, Lila T, Schekman R.
J Cell Biol. 1991 Aug;114(4):663-70. doi: 10.1083/jcb.114.4.663.PMID: 1907973