So this is the cytoplasm. And on the cytoplasmic side of the endoplasm reticulum, we have these ribosomes shown by these dots. So let's suppose at this ribosome, we begin the process of protein synthesis on the cytoplasmic side of the membrane. And as we continually synthesize that protein strand, the protein strand moves into the lumen of that endoplasm reticulum. So the lumen is the inside portion of that endoplasmic reticulum. And once inside the endoplasmic reticulum, there are special enzymes, complex of enzymes, which are responsible for actually creating the end linkage between asparagine and the respective oligosaccharide.