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Proteins.

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Presentation on theme: "Proteins."— Presentation transcript:

1 Proteins

2 Learning Objectives Define the following terms: protein, amino acid, peptide bond Describe the relationship between amino acids and proteins

3 Proteins Proteins are one of the organic macromolecules made from one or more chains of amino acids (monomer).

4 Parts of an Amino Acid O O Hydrogen Carboxylic Acid Group Amino Group
Side Chain O O

5 20 Amino Acids All of the many types of proteins are made from 20 different amino acids.

6 Amino Acids Make Proteins
Different combinations of amino acids produce different kinds of proteins.

7 Peptide Bond Amino acids are joined together by peptide bonds. Any amino acid can join any other amino acid.

8 Structure of Proteins Primary structure – a specific sequence of amino acids Secondary structure – folded polypeptide chain. Tertiary structure – 3-D folding of a polypeptide. Quaternary structure – a complex of protein molecules.

9 Function of Proteins Movement - actin and myosin in muscle fibers
Structure - collagen found almost everywhere in animals Regulation - enzymes Transport - hemoglobin in blood Nutrition - food group Defense - antibodies

10 End of Proteins

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