Fibroin is a fibrillar protein excreted by silkworms.



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Spider silk, spider web

While the density of spider silk is less than that of nylon filaments, its tensile strength is greater than that of steel.

Amino acids

Amino acids are the monomers of proteins.


Oxygen carrier protein in our red blood cells.

Secondary structure of proteins

Polypeptide chains are composed of amino acids and can appear in alpha-helix or beta-sheet form.

Structure of proteins

The structure and arrangement of polypeptide chains affects the spatial structure of proteins.


Carrier of genetic information in cells.

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