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Class11 - Chemistry 83 Class11 1 Biomolecules: proteins and...

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Unformatted text preview: Chemistry 83 Class11 1 Biomolecules: proteins and nucleic acids hhttp://www.cystinuria.org/resources/education/aminoacids/ Acid: carboxyl group Base: amine group Amino acids can exist in two forms: molecular and ionic Amino acids differ in R- groups Donates H + Accepts H + Molecular form Ionic form is a double ion - called a zwitterion Acids donate H + ions to bases Chemistry 83 Class11 2 http://www.personal.psu.edu/staff/m/b/mbt102/bisci4online/chemistry/charges.gif Twenty R-groups are found in natural protein molecules http://fajerpc.magnet.fsu.edu/Education/2010/Lectures/10_Proteins_Fles/image016.jpg Amino acids link together by peptide bonds, formed by dehydration, to produce polypeptides serine valine tyrosine cysteine Ser-val-tyr-cys 4 amino acids react 4 amino acid residues joined by peptide bonds Chemistry 83 Class11 2 http://www.personal.psu.edu/staff/m/b/mbt102/bisci4online/chemistry/charges.gif Twenty R-groups are found in natural protein molecules http://fajerpc.magnet.fsu.edu/Education/2010/Lectures/10_Proteins_Fles/image016.jpg Amino acids link together by peptide bonds, formed by dehydration, to produce polypeptides serine valine tyrosine cysteine Ser-val-tyr-cys 4 amino acids react 4 amino acid residues joined by peptide bonds Chemistry 83 Class11 3 Quaternary structure Tertiary structure http://iitb.vlab.co.in/userfiles/2010-10-18_Protein%20structure_theory.jpg Levels of Structure in Proteins (H-bonding between atoms in backbone) (Interactions of R-groups of one chain: H-bond, ionic, disulfide, hydrophobic) (Interactions of more than one chain) Protein is a polypeptide containing at least 50 amino acid residues. Protein is a polypeptide containing at least 50 amino acid residues....
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This note was uploaded on 10/19/2011 for the course CHEM 83 taught by Professor Bonk,j during the Fall '08 term at Duke.

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Class11 - Chemistry 83 Class11 1 Biomolecules: proteins and...

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