○N-acet/ glucosamine ● Mannose● Glucose 25.2 Oligosaccharides are added to proteins in the ER and golgi ●●鲁 Figure 25.4 Sugars are R glucosidases|&‖ removed in the er in a fixed NH order, initially comprising 3 H HC-CH2○鲁● glucose and 1-4 mannose residues. This trimming ↓ ER mannosidase generates a high mannose oligosaccharide. High mannose c2c○○ oligosaccharide 消当Figure 25.4 Sugars are removed in the ER in a fixed order, initially comprising 3 glucose and 1-4 mannose residues. This trimming generates a high mannose oligosaccharide. 25.2 Oligosaccharides are added to proteins in the ER and Golgi