4.6.1.18 extracellular - - 4.6.1.18 extracellular the enzyme is secreted - 4.6.1.18 lysosome - 5764 4.6.1.18 microsome membrane - 4.6.1.18 additional information analysis of synthesis and maturation, folding, quality control, and secretion, of pancreatic RNase in the endoplasmic reticulum of live cells, overview. Human RNase folds rapidly and is secreted mainly in glycosylated forms - 4.6.1.18 additional information analysis of synthesis and maturation, folding, quality control, and secretion, of pancreatic RNase in the endoplasmic reticulum of live cells, overview. In contrast to the slow in vitro refolding, the protein folds almost instantly after translation and translocation into the endoplasmatic reticulum lumen. Despite high stability of the native protein, only about half of the RNase reaches a secretion competent, monomeric form and is rapidly transported from the rough endoplasmic reticulum via the Golgi complex to the extracellular space, the rest remains in the endoplasmic reticulum mainly in the form of dimers and is slowly degraded -