Proteins

Amino Acids

The Peptide BondDehydration (condensation) reactions bond the

carboxyl group of one amino acid to the amino group of another to form a peptide bond.

A chain of amino acids linked by peptide bonds is called a polypeptide.

Polypeptides containing fewer than 50 amino acids are called oligopeptides .

Polypeptides containing more than 50 amino acids are called proteins.

dehydration synthesis H2O

How do proteins get broken down?

STRUCTURE OF PROTEINS

PrimarySecondaryTertiaryQuarternary

Clog blood vessels, impeding blood flow

DenaturationEnvironment changes affect the structure of

proteinsBonds can become weakened or destroyedProtein will unravel and lose its shapeThe protein becomes inactive and will not

functionRarely the protein can return to shape once

the denaturing substance is removed.