The sequence of amino acids of the protein pectainse is known. Following is a li

Question

The sequence of amino acids of the protein pectainse is known. Following is a list of amino acids and the number of each in the pectinase molecule Number in ectinase 21 Number in ectinase 15 16 Amino acid Amino acid Alanine Arginine Asparagine Asparatic acid Cysteine Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine Methionine Phenylalanine Proline Serine Threonine Tryptophan Tyrosine Valine 17 34 8 16 10 48 38 46 27 27 Hint: For this exercise, total number of amino acids = (number of nonpolar amino acids) + (number of polar and charged amino acids).] A) Based on this table and the structures of the amino acids (Figure 5.14 in your textbook), how many polar amino acids plus charged amino acids are present in this molecule? B) How many nonpolar amino acids are present in this molecule? C) What is the maximum number disulfide bonds this protein can have? D) This protein has 367 amino acids. Based on the amino acid composition, this protein is O predominantly polar predominantly nonpolar approximately the same polar and nonpolar amino acids

Explanation / Answer

ANSWER- A) Polar amino acids = 137 and charged amino acids = 71

total = 195

B) NON POLAR AMINO ACIDS = 159

C) 4

D) Predominantly polar as polarity depends on both polar and charged amino acids.

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