chapter 3-2

chapter 3-2 - -Amino acids are monomer building blocks of a...

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amino group hydrogen variable group carboxylic acid group O C C O R H H H H N ---Amino acids are monomer building blocks of a protein. Most amino acids consist of a central carbon with four functional groups:
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Glutamic acid Arginine Cysteine Phenylalanine
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Twenty amino acids occur in proteins of organisms Some have sulfur and so form disulfide bridges e.g Cysteine Different amino acids have different properties due to the different R groups they have (figure 3-11). Sequence of amino acids determine function of each protein
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Four levels of protein structure (see fig 3-13) 1. Primary structure 2. Secondary structure 3. Tertiary structure 4. Quaternary structure (when a protein has more than one polypeptide chain)
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gly leu leu val val lys lys lys lys gly gly his his ala ala lys lys val lys pro val lys pro
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leu val lys lys gly his ala lys val lys pro Primary structure ---Primary structure is the sequence of
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chapter 3-2 - -Amino acids are monomer building blocks of a...

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