Proteins + Amino Acids Flashcards
In cell membranes
Important structural role
Play role in
Transport, as nutrients, some hormones, movement, and protection against disease
Reserve source of
Energy, excess amino acids broken down in liver to be converted into energy rich fats or glucose
Serve as
Enzymes with control rate of reactions and regulate cell processes
Groups with proteins contain
Amine and carboxyl
Proteins are composed of
C, N, H, O
Fibrous
Hydrophobic, tough, hard but non mineralized structures
Globular
Hydrophilic
Number of amino acids
20 different amino acids
Bind by means of
Peptide bonds
Bacteria and plangs
Can produce own amino acids from more simple compounds
Animals
Some of the simple amino acids
Essential amino acids
Cannot be produced by animal cells or not in sufficient quantities, plants
Proteins involved in
All cellular reactions
Primary protein structure
Sequence of a chain of amino acids
Secondary protein structure
Occurs when sequence of amino acids are linked by hydrogen bonds
Tertiary protein structure
Occurs when certain attractions are present between alpha helices and pleated sheets
Quaternary protein structure
A protein consisting of more than one amino acid chain
Heat or pH changes
Protein denatures, 3D structure is destroyed, cannot function properly
Low temp.
Make proteins inactive
