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KERATIN

KERATIN. a family of fibrous structural proteins which form the exterior structure of  reptiles, birds, amphibians, and mammals. What is the need for Keratin?. The protein creates a hard surface Used in hooves, hair, nails

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KERATIN

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  1. KERATIN a family of fibrous structural proteins which form the exterior structure of  reptiles, birds, amphibians, and mammals

  2. What is the need for Keratin? • The protein creates a hard surface • Used in hooves, hair, nails • Serve as an insulating layer to protect the delicate new keratin below dead cells because the protein is mostly formed by dead cells which body sheds as new cells pushes up underneath it

  3. Nucleotide and amino acid sequences of the 40-k Da (H40) human keratin

  4. The most common amino acids found in keratins … Alananin Cysteine Glycine

  5. Intermolecular hydrogen bonding STRUCTURE APPEARANCE KERATIN IN WOOL Increased strength of the protein

  6. Helical structure affects flexibility, resilience, elasticity and wrinkling of wool Disulphide bonds make Keratin fibers insoluble in water and more resistant to chemical and physical attacks. (covalent bond of two thiol groups) Ionic and hydrophobic chemical cross links stabilize the protein in wet and dry conditions.

  7. Why I chose Keratin?

  8. Another Significance? Another important use for keratin is that its used in hair. There is a such thing as Keratin Treatment. It is used to make frizzy and curly hair, straight and smooth. Keratin  makes the hair  tough and insoluble due to the  high amount of  sulphur and the amino acid, cysteine.

  9. BIBLIOGRAPHY Pine, Chris. Why Wool? 23 Apr. 2008: n. pag. Web. 15 Oct. 2009.      <http://itech.dickinson.edu/chemistry/?cat=69>. Pine, Chris. Keratin. 23 Apr. 2008: n. pag. Web. 15 Oct. 2009.   <http://itech.dickinson.edu/chemistry/?cat=69>. Eckert, R. Human 40-kDa Keratin . "Sequence of the human 40-kDa keratin reveals      an unusual structure with very high sequence identity to the corresponding      bovine keratin." PubMed Central: 1115. N.p., n.d. Web. 15 Oct. 2009.      <http://www.ncbi.nlm.nih.gov/pmc/articles/PMC279716/?page=2>.

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