Transcription of PROTEINS Notes
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PROTEINS Notes
INTRODUCTIONP roteins are the most abundant biological macromolecules, occurring in all cellsand all parts of cells. Amino acids are the building blocks of PROTEINS . Allproteins, whether from the most ancient lines of bacteria or from the mostcomplex forms of life, are constructed from the same set of 20 amino acids. Whatis most remarkable is that cells can produce PROTEINS with strikingly differentproperties and activities by joining the same 20 amino acids in many differentcombinations and sequences. From these building blocks different organismscan make such widely diverse products as enzymes, hormones, antibodies,transporters, muscle fibers, the lens protein of the eye, feathers, spider webs,rhinoceros horn, milk PROTEINS , antibiotics, and mushroom poisons and othersubstances having distinct biological activities.
After reading this lesson, you will be able to zdescribe amino acids zexplain the structure of amino acids ... An α-amino acid consists of a central carbon atom, called the α carbon, linked to an amino group, a carboxylic acid group, a hydrogen atom, and a distinctive ... structure), methionine (one of the two sulfur-containing amino acids ...
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