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Most proteins made by ribosomes on the RER (rough endoplasmic reticulum) are glycoproteins, which is they hold short chains of carbohydrates (oligosaccharides) covalently related to them during passage by the Golgi and RER complex. Two major types of oligosaccharide linkage exist:
? O-linked oligosaccharides are commonly attached to the protein through O-glycosidic bonds to OH groups of Thr or Ser side chains. The residues which are changed are frequently in a region of the polypeptide chain which is rich in Thr and Ser residues. In plant glycoproteins, the OH sets of hydroxyproline (Hyp) residues can be glycosylated, by the hydroxylysine (Hyl) reduce in the mammalian protein collagen can be O-glycosylated.
? N-linked oligosaccharides are related to the protein via N-glycosidic will bonds to the NH2 where the Asn occurs in the sequence Asn-X-Ser (or Thr) where X is many amino acids except Pro. If the Asn is N-glycosylated the Thr or Ser residue in this motif is not O-glycosylated.
Explain some important phospholipids The chemical structure of phosphatidylcholine (lecithin) illustrated here in Figure is typical of the phosphatides found in the brai
For homework, I had to prove that a certain catalyst was a protein, then tell how I would purify the protein, then tell how I would clone a human chromosomal region that contains t
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in sericulture industry do which stages of silkworm weaver buy? why do they do so?
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A saline drip is to be prepared for a lab experiment that is looking at hydration in lab rats. Calculate the amount of NaCl need to make 4 liters of a 0.9% solution.
Little lipophilic (lipid-soluble) hormones distribute across the plasma membrane and then interact with intracellular receptors in the nucleus/cytosol. The receptor
Define Requirements of Chromium? There is no Recommended Dietary Allowance (RDA) for chromium but adequate intakes that can be used as a goal for individual intakes has been pr
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