ALG10, the α1,2-glucosyltransferase that transfers the terminal glucose residue to the lipid-linked precursor, of 509 aas and 12 TMSs.  Expressed in leaf epidermal cells with a reticular distribution pattern resembling endoplasmic reticulum (ER) localization.  An insertion mutant (alg10-1) accumulated mainly lipid-linked Glc(2) Man(9) GlcNAc(2) and displayed a severe protein underglycosylation defect. alg10-1 mutant plants had altered leaf size when grown in soil and showed activation of the unfolded protein response, increased salt sensitivity and suppression of the phenotype of α-glucosidase I-deficient plants (Farid et al. 2011).