Multiple choice

Which of the following statements about some uncommon amino acid residues is/are correct?

  1. Amino acid residues- 4-hydroxyproline and 5-hydroxylysine are important structural constituents of collagen.
  2. Histones have specifically methylated, acetylated, and/or phosphorylated Lys, Arg and Ser residues.
  3. N-formylmethionine is initially the N-terminal residue of all prokaryotic proteins.
  4. Gamma-carboxyglutamic acid is a constituent of several proteins involved in blood clotting.

  1. Only 1

  2. Only 2 and 3

  3. Only 3 and 4

  4. Only 2, 3 and 4

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

All these statements are correct.

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