lecture0201final - Proteins Formed by creation of peptide...

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Proteins Formed by creation of peptide bonds  between l-amino acids (a condensation  reaction).  In order to form the bond, amino acids  must be “activated” by being joined to a  specific tRNA (aminoacyl-tRNA) -   requires ATP. Peptide bond formation between  “activated” amino acids is catalysed by  ribosomes according to the mRNA triplet  code  Proteins have a carboxyl and an amino  terminus - directional.
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Figure 2.24
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Proteins After peptide bond formation, the  condensed remains of covalently- bound amino acids are called  “residues”  Each residue has a different R- group which sticks out from the -C- C-N-C-C-N-“backbone”  Backbone is NOT charged R groups CAN be charged, polar or  non-polar
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Figure 2.26
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Figure 2.27
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Primary stucture  Sequence of amino acid residues  Determined by mRNA code  In combination with environment,  primary structure determines  secondary, tertiary, quaternary  structures 
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This note was uploaded on 05/11/2010 for the course BIOLOGY 105 taught by Professor Richard during the Spring '10 term at George Mason.

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lecture0201final - Proteins Formed by creation of peptide...

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