Extreme C-terminal sites are posttranslocationally glycosylated by the STT3B isoform of the OST.
Shrimal S, Trueman SF, Gilmore R. Extreme C-terminal sites are posttranslocationally glycosylated by the STT3B isoform of the OST. J Cell Biol. 2013 Apr 01; 201(1):81-95.