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The hydrophobicity plot assigns each amino acid a hydrophobic value based on the method by kyte and doolittle. What can be inferred from the plot?

Sagot :

The hydrophobicity plot tells us about the location of transmembrane helices.

What is hydrophobicity plot?

  • Hydrophobicity plots are used to predict the location of turns in proteins.
  • In 1982, Kyte and Doolittle gave a hydrophobicity scale which gives each amino acid a hydrophobicity value.
  • A hydrophobicity plot is drawn between the residue number versus residue hydrophobicity.
  • These hydropathy plots are used to determine the transmembrane helices of proteins.
  • The transmembrane helices are present in the non polar area (hydrophobic) of the lipid membrane whereas the other parts are present in polar areas (hydrophilic).
  • Thus by computing the hydrophobicity value and plotting it on a graph we can find the loops and turns in proteins.
  • Nowadays there are many hydrophobicity scales determining the hydrophobicity value of amino acids.

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