structure of proteins Flashcards
(11 cards)
What is the primary structure of a protein?
The sequence of amino acids in the polypeptide chain.
What does the primary structure determine?
This determines the specific shape of the proteins.
What does the secondary structure represent?
The folding or coiling of the polypeptide as a result of hydrogen bonding.
What are the two types of secondary structure?
Alpha helix and beta pleated sheet.
How is the tertiary structure formed?
Folding and coiling of the secondary structure due to hydrogen bonds, ionic bonds and disulfide bonds.
What does the tertiary structure of an enzyme determine?
The shape of its active site.
What do globular proteins consist of?
A highly folded and coiled polypeptide chain.
What are examples of globular proteins?
Enzymes and antibodies.
What is a globular protein?
A compact, complex tertiary structure.
What is quaternary structure of a protein made up of?
More than one polypeptide chain.
What type of bonds are the polypeptide chains held together by?
Ionic bonds, hydrogen bonds and disulfide bonds.
