9/14 Enzymes

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Thermodynamics

2 Properties of Action

The free Energy diff (Change in G)

Energy Required (Activation Energy)
The free energy difference (Change in G) is between

the products and reactants
Which thermodynamic property determines whether the rxn will be spontaneous

The Free-Energy Difference
Energy Required (Activation Energy) determines what

the rate of the reaction
Enzymes only affect which thermodynmaic property

activation energy or the energy required for the rxn to initate
What does negative Change in G mean?

The rxn is energetically favored

but doesn't tell how fast
Hemoglobin is made up of what 2 componets?

Heme and Protein
Apoprotein

the folded polypeptide chain of a conjugated protein

Globin with by itself without the heme
Isozyme

Different protines that cataluze the same reaction
Enzymes that deifferent in structure or sequence are called what

Isoenzymes
pH in Enzymes affects what

The acidic or alkiline R Groups that make up the enzyme
How are substrates bound to the active site of enzymes

by noncovalent bonds
Induced Fit Model

The Structure of the enzyme is different depending on whether the substrate is bound or not