Facts About: A Heavily Glycosylated Protein in the Nucleus – RNA Polymerase II May 01, 2024 By: Richard D. Cummings O-GlcNAc is a major reversible modification of Ser/Thr residues found on thousands of intracellular glycoproteins in the nucleus, cytoplasm, and mitochondria, and links... Read More Facts About: A Heavily Glycosylated Protein in the Nucleus – RNA Polymerase II