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PROTEIN PHYSICS LECTURE 12
Globular Fibrous H-bonds & hydrophobics Membrane ____
Bacteriorodopsin with retinal Transport of protons H +
Porin Transport of polar molecules
Pore in membrane. Free energy of charge in the non-polar pore: ~ q 2 / [( MEMBR WATER ) 1/2 r PORE ] ~ ~ 20 kcal/mol / r PORE (Å) ~ 20 kcal/mol / r PORE (Å)
G-protein Slow decay of GTP = timer of action
Pigments in photo- syntheticcenter:Electrontransferchlorophyll Light Light
Tunneling P(X) ~ 10 -X(Å) T-independent Frequency of vibrations (attacks): f ~ 10 15 /sec Successful attacks: f SUCCS. (x) ~ P(x)f, e.g.: f SUCCS. (5Å) ~ 10 -5+15 ~ ~ 10 10 /sec ~ 10 10 /sec Atom 1Å Attenuation of electron density: electron density:
7.5 Proteins Learning Target: Explain the significance of polar and nonpolar amino acids. Outline the difference between fibrous and globular proteins.
Remember Atoms? Where were the protons and neutrons found? Where were the electrons found? How many electrons are in each shell when full?
Class Notes: Chapter 6 sec.2. Polar Molecules Chemical bonding is the result of either an atom sharing one or more electrons with another atom or an atom.
Properties of Water Biochemistry. Why is Water Important? Habitat Transport medium Some metabolic reactions Cell shape homeostasis.
Learning Targets “I Can…” -Draw a water molecule and label the atoms and their partial charges. -Distinguish between adhesion and cohesion. -Define “polarity.”
Chapter 4. Transport Across the Cell Membrane Substances need to move into and out of the cell in order to maintain homeostasis They can do this by.
CHAPTER 12 Membrane Structure and Function. Biological Membranes are composed of Lipid Bilayers and Proteins -Biological membranes define the external.
Transport. Concentration Gradient If there is a concentration gradient, movement will occur After concentrations are equal= dynamic equilibrium – Dynamic.
Review for Cell Membrane Structure & Molecular Movement Quiz!
The Cell Membrane. Phospholipids Fatty acid Phosphate Phosphate head –hydrophilic Fatty acid tails –hydrophobic Arranged as a bilayer Aaaah, one of those.
Water and Its Importance. Water and Living Organisms Water is the most important compound in living organisms. It makes up 70 – 95% of most organisms.
Movement Through the Membrane Mr. Luis A. Velázquez Biology.
Organic and Inorganic Molecules in the Human Body.
Chapter 2 Chemistry of Life Section 1: Nature of Matter.
The Cell Membrane.
Polarity of Bonds Molecular Polarity. Equal Pull on Electrons If there is no difference in the electronegativity of the atoms forming a covalent bond,
What our bodies are made of Chemistry of Cells. Nature of Matter All matter is made of atoms. Atoms consist of electrons, protons and neutrons. Molecules.
Final Jeopardy Question Atoms & Bonding Protein Structure 500 Cellular Respiration Macro- molecules & Conservation of Energy Enzyme Activity Photo-
-OH Name of Functional group: This is a hydroxyl Function of the group: Draws electrons Attracts water, Dissolves organic materials such as sugar.
KEY CONCEPT Water’s unique properties allow life to exist on Earth.
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