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WELCOME ON THE BIOCHEMISTRY LECTURES

WELCOME ON THE BIOCHEMISTRY LECTURES. 2 nd semester An Introduction to Biochemistry. Bioorganic Chemistry 1. Amino acids, Protein and Enzymes 2. Other b iomolecules: Carbohydrates Lipids Nucleotides and Nucleic Acids Vitamins and Coenzymes. Biochemistry - Bioenergetics

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ACID BASE BUFFERS

ACID BASE BUFFERS. Dr Nithin Kumar U Assistant Professor Biochemistry, YMC. ACIDS. Acids are substances which are:- proton donors (Lowry-Bronsted Theory) electron acceptors (Lewis Concept) dissociate to give hydrogen ions ( Arrhenius concept ) HA H + + A -

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Background review for Biochemistry

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Acid/Base Buffering

Acid/Base Buffering. Reginald Stanton, PhD September 2009.

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Blood Buffers

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Pre-Med Club BBQ , TODAY @ 4pm @ Marine Park .

Pre-Med Club BBQ , TODAY @ 4pm @ Marine Park . Come join the fun, eat free food, and make new friends!!! Also, at the BBQ there will be sign up sheets for volunteer opportunities for Make A Difference Day (Saturday, Oct. 28th from 8am-1pm )

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Chemical equilibria, principle of pH, buffers

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Strong Acids/ Bases

Strong Acids/ Bases. Strong Acids more readily release H+ into water, they more fully dissociate H 2 SO 4 ? 2 H + + SO 4 2- Strong Bases more readily release OH- into water, they more fully dissociate NaOH ? Na + + OH - Strength DOES NOT EQUAL Concentration!. Acid-base Dissociation.

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Strong Acids/ Bases

Strong Acids/ Bases. Strong Acids more readily release H+ into water, they more fully dissociate H 2 SO 4 ? 2 H + + SO 4 2- Strong Bases more readily release OH- into water, they more fully dissociate NaOH ? Na + + OH - Strength DOES NOT EQUAL Concentration!. Acid-base Dissociation.

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Water

Water. Properties of water. Very polar Oxygen is highly electronegative H-bond donor and acceptor High b.p., m.p., heat of vaporization, surface tension. Water dissolves polar compounds. solvation shell. Non-polar substances are insoluble in water. Many lipids are amphipathic.

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Amino Acids

O. C. OH. Amino Acids. carboxylic acid. H 2 N. H. C. amine. ?. H. R. R. varies with amino acid. R = H. glycine. -CH-CH 3. CH 3. -CH 2 -CH-CH 3. CH 3. -CH-CH 2 -CH 3. CH 3. Nonpolar. R-groups. -H. glycine. alanine. -CH 3. valine. proline. 2 o amine.

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Acid-Base Geochemistry

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Acid-Base Geochemistry

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Amino Acids

O. C. OH. Amino Acids. carboxylic acid. H 2 N. H. C. amine. ?. H. R. R. varies with amino acid. R = H. glycine. C. H. H 2 N. R. O. C. OH. Amino acids. O -. H 3 N +. H. R. glycine. non-chiral. all other ?-amino acids in proteins. L -enantiomers. zwitterion.

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ANALYTICAL CHEMISTRY CHEM 3811 CHAPTER 11

ANALYTICAL CHEMISTRY CHEM 3811 CHAPTER 11. DR. AUGUSTINE OFORI AGYEMAN Assistant professor of chemistry Department of natural sciences Clayton state university. CHAPTER 11 POLYPROTIC ACIDS AND BASES. POLYPROTIC ACIDS. - Have more than one acidic proton Examples

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Amino Acids

O. C. OH. Amino Acids. carboxylic acid. H 2 N. H. C. amine. ?. H. R. R. varies with amino acid. R = H. glycine. C. H. H 2 N. R. O. C. OH. Amino acids. O -. H 3 N +. H. R. glycine. non-chiral. all other ?-amino acids in proteins. L -enantiomers. zwitterion.

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Acid-base Dissociation

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Acid-base Dissociation

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Chap. 2 Problem 3

Chap. 2 Problem 3. F. X. Phe (F). The structure of the peptide and the charges of all functional groups at pH 7 are shown in the figure. The net charge is -1.

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