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Levels of Protein structure:

1. Primary: refers to the unique sequence of amino acids in the protein. All proteins have a special sequence of amino acids, this sequence is derived from the cell's DNA.

2. Secondary : the coiling or bending of the polypeptide into sheets is referred to the proteins secondary structure. alpha helix or a beta pleated sheet are the basic forms of this level. They can exist separately or jointly in a protein.

3. Tertiary: The folding back of a molecule upon itself and held together by disulfide bridges and hydrogen bonds. This adds to the proteins stability.

4. Quaternary: Complex structure formed by the interaction of 2 or more polypeptide chains.

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15y ago
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14y ago
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12y ago

1. Primary - the sequence of amino acids

2. Secondary - the local structures (such as coils and loops - mainly caused by H-bonds)

3. Tertiary - the 3D structure of the protein

4. Quaternary - when more than one polypeptide chain is joined to make a complex protein

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11y ago

primary structure-sequence of amino acid linked

secondary structure-folding of amino acids to stabilize the sequence(alpha-helix or beta-pleated)

tertiary structure-spatial arrangement of protein

quaternary structure-how two or more proteins are spatially oriented.

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9y ago

There are an unlimited number of levels of organization in the world. Most people choose to use a 3 or 5 level chart.

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12y ago

There are 4 levels of protein structure

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3y ago

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Q: What are the four basic levels of organization of a protein?
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