Quaternary arrangement of more than one polypeptide chain in a single protein

Quaternary arrangement of more than one polypeptide

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Quaternary - arrangement of more than one polypeptide chain in a single protein; only occurs in proteins containing more than one polypeptide chain, like hemoglobin. e. - What is the difference in function between fibrous and globular proteins? i. Fibrous - elongated strands that function in structure or contraction, like collagen (found in tendons and hair) and tropomyosin, a protein in muscle cells. ii. Globular - irregular and bulky, acting as chemical messengers for intercellular communication, receptors that bind chemical messengers, carrier proteins to transport substances in blood or across membranes, and enzymes that catalyze chemical reactions in the body. f. - What is the function of proteins as chemical messengers, receptors, carrier proteins, and enzymes? g. - What are glycoproteins and lipoproteins? i. Glycoproteins have carbs attached to the polypeptide chains; contribute to cell recognition, so immune cells know the difference between friend and foe ii. lipoproteins have lipids attached to them; found in blood, transporting lipids 11. Nucleotides and Nucleic Acids 12. Cell Structure , 2.2 page 29 13. Structure of the Plasma Membrane a. - What is the role of the plasma membrane and what other membranes are similar to it?
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i. Separates cell from environment, nuclear envelope, and membrane bound organelles 14. Phospholipid Bilayer
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