7.5 proteins learning target: explain the significance of polar and nonpolar amino acids. outline...
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7.5 ProteinsLearning Target: Explain the significance of polar and nonpolar amino acids. Outline the
difference between fibrous and globular proteins.
Cytoplasmic Proteins
● Surrounded by water● Polar amino acids side chains fold to
the outside of the structure● Non-polar amino acid side chains are
protected on the inside of the structure
Membrane Proteins● How does the structure of the cell
membrane affect transmembrane proteins?
● Predict: Label hydrophilic heads of phospholipids, hydrophobic tails of phospholipids, polar amino acid region, and non-polar amino acid region.
Membrane Proteins● Within the amphipathic membrane● Polar amino acids in hydrophilic
region (inner/outer surface)● Nonpolar amino acids in hydrophobic
core● Polar amino acids lining channels so
charged/polar molecules can pass through
Fibrous & Globular Proteins
Fibrous Proteins Globular Proteins
Long and narrow Compact and rounded
Insoluble in water Soluble in water
Structure and support Enzymes and transport
Keratin Hemoglobin
Collagen Catalase
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