Topic_4.3_4.4_Biochemistry - Introduction to Biochemistry...

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Introduction to Biochemistry Lipid, Carbohydrates, Protein and amino Acids , Polymers Chapter 4.0
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Protein and Amino Acids Chapter 4.3
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Proteins Amino acids are the basic structural units of proteins. An amino acid is a compound that contains at least one amino group (-NH 2 ) and at least one carboxyl group (-COOH) + H 3 N C C N C C O - + H 2 O H R 1 H R 2 O O H + H 3 N C C O - + + H 3 N C C O - H R 1 H R 2 O O Peptide bond 25.3
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Peptides are amino acid polymers in which the individual amino acid units , are linked together by amide bonds, or peptide bonds Peptide Bond 2 amino acids react together, H 2 O is eliminated. This is condensation reaction. 2 amino acids form di peptide 3 amino acids form tri peptide 15 30 amino acids form oli gopeptide > 30 amino acids form poly peptide
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Amino acid Amino acid: a compound that contains both an amino group, -NH 2 and a carboxyl group, -COOH α α -amino acid: amino acid: an amino acid in which the amino group is on the carbon adjacent to the carboxyl group α CH 3 CH 2 C COOH H NH 2 NH 2 C COOH H CH 2 CH 3
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Valine Val Alanine Ala Glycine Gly Structure Name H CH NH 2 COOH H 3 C CH NH COOH HC CH NH COOH CH CH 3 20 amino acids
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Phenylalanine Phe Isoleucine Ile Leucine Leu Structure Name C H C H 2 C H C H 3 C H N H 2 C O O H CH NH COOH CH 3 CH 2 CH CH 3 CH 2 CH NH COOH
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Methionine Met Cysteine Cys Threonine Thr Structure Name CH 2 CH 2 CH 2 NH C COOH H HO CH 2 CH NH 2 COOH C H 3 C H O H C H N H C O O H
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Serine Ser Proline Pro Tryptophan Trp Structure Name CH 2 CH 2 CH 2 NH C COOH H HO CH 2 CH NH 2 COOH O NH 2 NH OH
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Methionine Met Cysteine Cys Threonine Thr Structure Name C H 3 C H O H C H N H C O O H HS CH NH COOH CH 2 CH NH COOH CH 3 S CH 2 CH 2
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Glutamine Gln Asparagine Asn Tyrosine Tyr Structure Name NH 2 C CH 2 CH COOH O NH 2 NH 2 C CH 2 CH 2 CH COOH O NH 2 CH NH COOH CH 2 HO
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Lysine Lys Glutamic acid Glu Aspartic acid Asp Structure Name HOOC CH 2 CH 2 CH COOH NH 2 HOOC CH 2 CH COOH NH 2 H 2 N CH 2 CH 2 CH 2 CH 2 CH COOH NH 2
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Histidine His Arginine Arg Structure Name H 2 N C NH (CH 2 ) 3 CH COOH NH NH 2 HC C=CH 2 CH COOH │ │ N NH NH 2 CH
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25.3
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c Human beings can synthesize about half of the amino acids needed to make proteins. c
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Topic_4.3_4.4_Biochemistry - Introduction to Biochemistry...

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