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Bio Ch2.4b Protein
Bio Ch2.4b Protein Bio Molecules
Term | Definition |
---|---|
PROTEIN | Contain elements: C (carbon), H (Hydrogen), O (oxygen), N (nitrogen), S (sulfur). Multi-purpose molecules. |
Protein main functions | 1) helps MUSCLES move 2) helps IMMUNE SYSTEM protect against germs 3) helps HORMONES send signals from one body system to another 4) helps ENZYMES make chemical reactions |
Protein examples | 1) Insulin - hormone that controls blood sugar levels 2) Actin & Myosin - found in muscles 3) Antibodies - helps fight against germs 4) Pepsin - a digestive enzyme in stomach 5) Collagen & keratin - structural component of skin, hair, fingernails & c |
Amino Acids | Protein MONOMER 20 amino acids: same basic structure; "R" variable changes |
Amino Acid chemical properties | hydroPHOBIC (fear water) OR hydroPHILIC (love water) |
Protein structure | Proteins have 3D structures. Amino acid chain gets folded into complex 3D structures. |
Structure Informs Function | If protein structure changes, the protein can’t perform its job |
Denature | change shape pH and temperature affect protein shape |
What happens when a protein folds into a 3D structure? | hydroPHOBIC amino acids go ..... |