Amino Acids

Question 1

secondary structure near N terminus of amino acid is

Answer 1

An alpha helix is an element of secondary structure in which the amino acid chain is arranged in a spiral. The kinemage linked above shows an individual alpha helix, viewed from the N-terminal end to resemble the “helical wheel” (see figure below).

Question 2

Ubiquitination is a post translational modification of a protein often through a bond with the sulfur on the cysteine side chain. secondary structure near N terminus of amino acid is _____

Answer 2

thioester bond

Question 3

What is a protease?

Answer 3

proteases cleave peptide bonds using hydrolysis which uses water to break a bond

Question 4

What does G210A mutation indicate?

Answer 4

a glycine was replaced with alanine at position 120

glycine is the only achiral compound, exchanged for chiral compounds

Question 5

What is phospholipidation?

Answer 5

should include a phosphate and a lipid

Question 6

What does N and C terminus look like?

Answer 6

Question 7

when lysine undergoes gel electrophoresis at physiological pH it migrates towards anode/or cathode? bc its pos/ or neg?

Answer 7

towards cathode bc lysine is positive

cathode is positive
lysine is postiive