Last Modified: 2012-10-26
Spontaneously form micelles or bilayers in water.
Have a polar "head" and 2 long, nonpolar "tails".
Steroids: Some function as hormones in animals.
Fats: Long-term energy storage.
Changing environmental conditions may alter the activity of enzymes.
Drive the energetically unfavorable reactions.
They help the body recognize and destroy foreign microbes and cancer cells.
They transport oxygen in the blood of vertebrates
They provide structural support for many animal tissues.
They transport ions and molecules across cell membranes.
They play a key role in the contraction of muscles.
The shape of a protein is affected by environmental conditions such as temperature, pH, and ionic concentration.
Changes in environmental conditions can alter the shape of a protein or cause it to unfold completely.
Each protein has a set of optimum conditions under which it works best.
The optimum environmental conditions for a protein are usually similar to the conditions where it normally functions.
Secondary: alpha helices and beta sheets
Quaternary: interactions between 2 or more polypeptides to form a protein.
Both have nitrogenous bases.
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