What does it mean for an amino acid to be polar? Please explain what qualities about an amino acid might make the amino acid polar. The disease known as sickle cell anemia is due to a genetic mutation which replaces glutamic acid, a polar amino acid with valine. Please explain how this affects the hemoglobin.
Proteins
We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.
Protein Expression
The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.
Proteins are folded polypeptides. A polypeptide is a polymer of amino acid residues linked via a peptide bond. Amino acids are biomolecules that have an amino group, a carboxyl group and a chemically diverse side group (called the R group) attached to the same carbon called the alpha carbon. As many as 20 different amino acids are commonly found in all proteins. Two amino acids differ from each other based on the chemical properties of the side group attached to alpha-carbon.
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