Q14 dominate at the following pH values 4.0, 6.0 and 8.0? Calculate the pl of gl

Question

Q14

dominate at the following pH values 4.0, 6.0 and 8.0? Calculate the pl of glycine. . Myoglobin contains eight (helices, one of which has the following sequence: -Gin-Gly-Ala-Met-Asn-Lys-Ala-Leu-Glu-His-Phe-Arg-Lys-Asp-lle-Ala-Ala Side chain pKas: Lys 10.5, His 6.0, Asp 3.9.,TArg 12.5, Glu 4.1 (a). Which side chains are likely to be on the side of the helix that faces the interior of the protein? Which side chains are likely to be facing the aqueous solvent? (b). (C). Which of the side chains are expected to be positively charged at pH 7.0 (d) Which of the side chains are expected to be negatively charged at pH 7.0 14. The number of structurally different polysaccharides that can be made with 20 different monosaccharides is far greater than the number of different polypeptides that can be made with 20 different amino acids, if both polymers contain an equal number (say 100) of total residues. Explain why. Explain why glycine and proline are the least comm helices. on amino acids found in alpha 15

Explanation / Answer

The number of structurally different polysaccharide that can be made with 20 different monosaccharide is far greater than different polypeptide that can be made with 20 different amino acid is because the formation of Polysaccharide from monosaccharide is a exothermic reaction where Delta G is negetive as it is feasible reaction.This reaction is a very spontaneous reaction.While the formation of polypeptides with amino acids is a endothermic reaction where Delta G is positive and moreover whenever a peptide bond is formed a water molecule is always given out.Whenever a peptide bond is formed 18 molecule of water is given out.That is why Polysaccharide is far greater.

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