LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
This enzyme is also known as protein kinase A (PKA). This is the holoenzyme, which consists of two regulatory subunits and two catalytic subunits. Protein kinase enzymes modify other proteins by chemically adding phosphate groups to them (phosphorylation). PKA regulates a number of cellular processes, including lipid and glucagon metabolism.
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