Protein Proteins are organic compounds containing carbon, hydrogen, oxygen and nitrogen. It may contain sulphur and phosphorous also. Amino acid is the simplest unit of protein. The quality of protein depends upon the amino acids they contain. There are about 20 amino acids which are essential for human growth and development. Human body cannot synthesize these amino acids. There fore, these amino acids must be present in the proteins we eat.
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Protein Proteins are organic compounds containing carbon, hydrogen, oxygen and nitrogen. It may contain sulphur and phosphorous also. Amino acid is the.
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ProteinProteins are organic compounds containing carbon, hydrogen, oxygen and
nitrogen.
It may contain sulphur and phosphorous also.
Amino acid is the simplest unit of protein.
The quality of protein depends upon the amino acids they contain. There are
about 20 amino acids which are essential for human growth and development.
Human body cannot synthesize these amino acids. There fore, these amino
acids must be present in the proteins we eat.
Proteins are the most body building –materials.
They are essential for growth, repair and
replacement of injured parts.
Structure of protein
•A protein exhibits four levels of structural organization:
1.Primary Structure of Proteins: To define, primary structure of a
protein is the sequence of amino acids that are linked by covalent
peptide bonds to form a polypeptide chain. It is the description of
basic structure of a protein.
2.secondary Structure of Proteins: It is the repeated twisting and
folding of neighboring amino acids in the polypeptide chain The
secondary structure is stabilized by hydrogen bonds which form at
regular intervals along the polypeptide backbone.
3.TertiaryStructure of Proteins: The tertiary structure of a
protein refers to its three-dimensional shape of a polypeptide
chain. Each protein has a unique tertiary structure that
determines how it will function.
4.Quaternary Structure of Proteins: When a protein
contains more than one polypeptide chain, the arrangement of
individual polypeptide chains relative to one another is
Quaternary structure.
Diagram of Protein structure
Sources of protein Good Sources Fair sources Poor sources