Researchers have described thebinary patterning of polar and nonpolar ...

Researchers have described the â€œbinary patterningâ€ of polar and nonpolar amino acids in the sequences of proteins....

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Biology

Researchers have described theâ€œbinary patterningâ€ of polar and nonpolar amino acids in thesequences of proteins. In their code, polar and charged residueslike D, N, E, Q, K, H, and R are represented as open circles (â—‹)and nonpolar residues like F, L, I, M, and V as closed circles (â—).Thus, a polypeptide with the sequence asp-ile-his-phe-gln would berepresented as â—‹â—â—‹â—â—‹. Researchers analyzed the binary patterns ofisolated secondary structure elements (short pieces) from nativeproteins. A sequence with the pattern â—‹â—â—â—‹â—‹â—â—â—‹â—‹â—â—â—‹ forms anamphipathic alpha helix that has a nonpolar face and a polar face.A sequence with the pattern â—‹â—â—‹â—â—‹â— forms an amphipathic betastrand. Explain these observations by discussing the structures ofhelices and sheets.

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To answer these questions one should observe the periodicity andrepeating patterns in the sequence1 has a nonpolar residue after every 3 or4 positions which is similar to the alphahelical See Answer

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Researchers have described the â€œbinary patterningâ€ of polar and nonpolar amino acids in the sequences of proteins....