The sequence of amino acids of the protein insulin is known. Following is a list

Question

The sequence of amino acids of the protein insulin is known. Following is a list of amino acids and the number of each in insulin. Insulin Amino acid alanine arginine asparagine aspartic acid cysteine glutamic acid glutamine glycine histidine isoleucine Amino acid leucine lysine methionine phenylalanine proline serine threonine tryptophan tyrosine valine 12 14 A) Based on this table and the structures of the amino acids (Figure 5.14 in your textbook), how many negatively charged amino acids are present in this molecule? B) Based on this table and the structures of the amino acids, how many positively charged amino acids are present in this molecule? B) Based on this table and the structures of the amino acids, how many polar (but not charged) amino acids are present in this molecule? C) What is the maximum number disulfide bonds this protein can have? D) This protein has 179 amino acids. Based on the amino acid composition, this protein is O predominantly neutral negatively charged O positively charged

Explanation / Answer

Ans. A) negative charged amino acids.

1. Aspartic acid

2.glutamic acid

Total number is 2.

B) positively charged

1.arginine

2.lysine

Two positively charged amino acids.

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