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PROTEINS

Dive into the characteristics of proteins - essential elements, roles in organisms, and formation process. Learn about amino acids, dipeptides, and how they combine to create polypeptides, the basis of proteins.

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PROTEINS

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  1. PROTEINS

  2. Characteristics of Proteins • Contain carbon, hydrogen, oxygen, nitrogen, and sulfur • Serve as structural components of animals • Serve as control molecules (enzymes) • Serve as transport and messenger molecules • Basic building block is the amino acid

  3. Amino Acid • Amine group acts like a base, tends to be positive. • Carboxyl group acts like an acid, tends to be negative. • “R” group is variable, from 1 atom to 20. • Two amino acids join together to form a dipeptide. • Adjacent carboxyl and amino groups bond together.

  4. Some Amino Acids

  5. Some More Amino Acids

  6. Still More Amino Acids

  7. Formation of a Dipeptide Dehydration synthesis

  8. Amino Acid + Amino Acid --> Dipeptide Amino Acid + Dipeptide --> Tripeptide A.A. + A.A. + …..+ Tripeptide --> Polypeptide

  9. A protein consists of one or more polypeptide chains.

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