protein structure _chap1 and 2_

protein structure _chap1 and 2_ - Four levels of...

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Primary Structure refers to the linear sequence of amino acids that make  up the polypeptide chain. This sequence is determined by the genetic  code, the sequence of nucleotide bases in the DNA. The bond between  two amino acids is a peptide bond. This bond is formed by the removal of  a H 2 0 molecule from two different amino acids, forming a dipeptide. The  sequence of amino acids determines the positioning of the different R  groups relative to each other. This positioning therefore determines the  way that the protein folds and the final structure of the molecule.  The secondary structure of protein molecules refers to the formation of a  regular pattern of twists or kinks of the polypeptide chain. The regularity is  due to hydrogen bonds forming between the atoms of the amino acid  backbone of the polypeptide chain. The two most common types of 
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This note was uploaded on 04/10/2009 for the course MCB 57703 taught by Professor Machen during the Fall '08 term at University of California, Berkeley.

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protein structure _chap1 and 2_ - Four levels of...

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