Question

56 & 58 please

Pounds. on with in the 18.56 What kinds of changes take place in a protein when it is! denatured? 18.57 Explain how a protein is denatured by the following: (a) Heat (b) Strong acids (c) Organic solvents 18.58 Use the three-letter abbreviations to name all tripeptides that contain valine, methionine, and leucine. 18.59 Write structural formulas for the two dipeptides that contain leucine and aspartate. 18.60 Which of the following amino acids are most likely to be found on the outside of a globular pretein, and which of them are more likely to be found on the inside? Explain each answer. (Hint: Consider the effect of the amino acid side chain in each case.) (a) Valine (b) Aspartate (c) Histidine in the

Answer 1

56)

When a protein is denatured by generally concentrated urea solutions, it disrupts three dimensional structures like quaternary, tertiary, and secondary structures by breaking hydrogen bonds, disulfide bonds present in random coils, alpha helices and beta sheets and finally it becomes a random shaped. But primary structure is intact (sequence of amino acids - polypeptide).

58)

Val-Met-Leu

Val-Leu-Met

Met-Val-Leu

Met-Leu-Val

Leu-Met-Val

Leu-Val-Met

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