PROTEINS.

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PROTEINS

Proteins Proteins = Polypeptides Production: in the ribosomes through the process of protein synthesis

Proteins Elements: C, H, O, N Monomer: amino acids (20 total) (assembled together based on DNA instructions and connected by a peptide bond)

Recognize protein structure by looking for NH2 on one side and COOH on the other side

Structures Primary (1) – sequence of AA Secondary (2) – folds as alpha helix and pleated sheet

Proteins Tertiary (3) – folded and coiled – now functional Quaternary (4) – more than 1 folded

1 2 3 4

Proteins can be found in: Meats Eggs Nuts Eye color Hair Skin Bugs YOU!

Examples Enzymes – speed up reactions by lowering activation energy Hemoglobin – carries oxygen Insulin – controls blood sugar Keratin & Collagen – structure & support Muscles – contraction Channel Proteins – transport Antibodies – defense against pathogens (bad things)

Denature – unfolding or unbending of a protein Caused by a temperature or pH change EX: Cooking an egg = denaturing by applying heat