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The next quiz will be on Friday, 4/27/2018. You will be asked to draw a peptide...
HW Question: Draw the amino acids, lysine and valine joined by a peptide bond. Next, place...
HW Question: Draw the amino acids, lysine and valine joined by a peptide bond. Next, place a square around the peptide bond within the dipeptide molecule. Finally circle all the atoms which could interact with a water molecule.
1. draw structures illustrating the hydrogen bonding between amide groups of peptide chains 2. what is...
1. draw structures illustrating the hydrogen bonding between amide groups of peptide chains 2. what is the configuration of almost all naturally occurring amino acids at the a (alpha) carbon 3. why is an alpha amino acid such as alanine more acidic than a regular carboxyllic acid 4. strecker synthesis Formation dl-phenylalanine 5. outline the steps to synthesize the simple dipeptide AL (think about two amino acids that begin with an A and an L) 6. give the structure and...
Suppose you have a peptide composed of 4 amino acids bonded together: glutamine, glycine, glutamic acid,...
Suppose you have a peptide composed of 4 amino acids bonded together: glutamine, glycine, glutamic acid, and the novel amino acid friendsamine, which has an ionizable side group with a pKa of 5.9. At pH 7.0, this peptide has a net charge of -2. What is the charge on the protonated form of the friendsamine side group? Explain how you determined the charge on the protonated friendsamine side group
1. What amino acids do the following abbreviations stand for? Draw the structure of each. a)...
1. What amino acids do the following abbreviations stand for? Draw the structure of each. a) lle b) Thr c) Gin 2. Name and draw the structures of the amino acids that fit these descriptions: a) Contains an isopropyl group b) Contains a secondary alcohol group 3. Which of the following objects is chiral? a) A pair of scissors b) A comb c) A drinking glass 4. What does the term achiral mean? Give two examples involving organic structures.. 5....
1. Given the following peptide, which of the following statements is true? Question options: a) The...
1. Given the following peptide, which of the following
statements is true?
Question options:
a) The N-terminal residue is leucine.
b)This peptide contains 4 amino acid residues.
c) The peptide contains a total of 6 ionizable groups.
d) The net charge of this peptide at pH 7 is +1 Locate any
peptide bond along the backbone of the given peptide.
e) The bond between the C (of the C=O) and the N (of the N-H) of
a peptide bond has...
1.) Draw the structure of the amino acid Serine(ser), which has R=-CH2-OH. Label the alpha carbon. 2.) Draw the dipeptid...
1.) Draw the structure of the amino acid Serine(ser), which has R=-CH2-OH. Label the alpha carbon. 2.) Draw the dipeptide that forms between serine and alanine. The dipeptide sequence is Ser-Ala. Label the peptide bond. 3.) How many amino acids residues are in a polypeptide containing 6 peptide bonds? How many peptide bonds are in a tripeptide 4.) Sketch a alpha-helix and a beta-sheet as best as you can. Label each.
3. The questions below refer to the cyclic peptide shown below. HO H. -ΝΗ HN OH...
3. The questions below refer to the cyclic peptide shown below. HO H. -ΝΗ HN OH HN -NH ot SH Me a. This peptide is made from how many amino acids? (single number on the line) b. How many potential diastereomers are possible for this molecule? (single number) c. Starting at the glycine residue, draw the linear, Fmoc-protected form of the peptide shown above. Make sure you are drawing the correct stereochemistry! Do not use any abbreviations. Draw out the...
PRELAB ASSIGNMENT 1 Draw the structure of the amino acid son CH-OH Label the alpha carbon...
PRELAB ASSIGNMENT 1 Draw the structure of the amino acid son CH-OH Label the alpha carbon acid Sorine (en) which has R MO CHE OH CH2 OH 2. Draw the dipeptide that forms betw the peptide bond. s between serine and alanine The dipeptide sequence is Ser Ala Lace CH NCH H, A - — сH — с CH2 OH 3. How many amino aci arty amino acid residues are in a polypeptide containing 6 peptide bonos How many peptide...
Need some help with these questions Redraw the pyrimidine base next to the paired purine base...
Need some help with these questions
Redraw the pyrimidine base next to the paired purine base in the 1^st box and show the H-bonding that exisst in the DNA double helix. The structures are given for you in the second box. Which of the following is the structure of vitamin A? Place a square. Ninhydrin reagent reacts with alpha-amino acids to give a purple color. In the reaction ofninhydrin with phenylalanine, which of the following is responsible for this color?...
25. Consider two peptide sequences: LKAENDEAARAMSEA and CRAGGFPWDQPGTSN. Which of the two is more likely to adopt an al...
25. Consider two peptide sequences: LKAENDEAARAMSEA and CRAGGFPWDQPGTSN. Which of the two is more likely to adopt an alpha-helical structure? Why? 26. A beta strand is a stretch of residues in the extended conformation that can participate in a beta sheet. (In the figure at right, beta strands A and B participate in a two-strand sheet.) What sorts of hydrogen bonds are required for the formation of single beta strands and for the formation of beta sheets? backbone- backbone sidechain...
1. draw structures illustrating the hydrogen bonding between amide groups of peptide chains 2. what is the configuration of almost all naturally occurring amino acids at the a (alpha) carbon 3. why is an alpha amino acid such as alanine more acidic than a regular carboxyllic acid 4. strecker synthesis Formation dl-phenylalanine 5. outline the steps to synthesize the simple dipeptide AL (think about two amino acids that begin with an A and an L) 6. give the structure and...
1. What amino acids do the following abbreviations stand for? Draw the structure of each. a) lle b) Thr c) Gin 2. Name and draw the structures of the amino acids that fit these descriptions: a) Contains an isopropyl group b) Contains a secondary alcohol group 3. Which of the following objects is chiral? a) A pair of scissors b) A comb c) A drinking glass 4. What does the term achiral mean? Give two examples involving organic structures.. 5....
1. Given the following peptide, which of the following
statements is true?
Question options:
a) The N-terminal residue is leucine.
b)This peptide contains 4 amino acid residues.
c) The peptide contains a total of 6 ionizable groups.
d) The net charge of this peptide at pH 7 is +1 Locate any
peptide bond along the backbone of the given peptide.
e) The bond between the C (of the C=O) and the N (of the N-H) of
a peptide bond has...
3. The questions below refer to the cyclic peptide shown below. HO H. -ΝΗ HN OH HN -NH ot SH Me a. This peptide is made from how many amino acids? (single number on the line) b. How many potential diastereomers are possible for this molecule? (single number) c. Starting at the glycine residue, draw the linear, Fmoc-protected form of the peptide shown above. Make sure you are drawing the correct stereochemistry! Do not use any abbreviations. Draw out the...
PRELAB ASSIGNMENT 1 Draw the structure of the amino acid son CH-OH Label the alpha carbon acid Sorine (en) which has R MO CHE OH CH2 OH 2. Draw the dipeptide that forms betw the peptide bond. s between serine and alanine The dipeptide sequence is Ser Ala Lace CH NCH H, A - — сH — с CH2 OH 3. How many amino aci arty amino acid residues are in a polypeptide containing 6 peptide bonos How many peptide...
Need some help with these questions
Redraw the pyrimidine base next to the paired purine base in the 1^st box and show the H-bonding that exisst in the DNA double helix. The structures are given for you in the second box. Which of the following is the structure of vitamin A? Place a square. Ninhydrin reagent reacts with alpha-amino acids to give a purple color. In the reaction ofninhydrin with phenylalanine, which of the following is responsible for this color?...
25. Consider two peptide sequences: LKAENDEAARAMSEA and CRAGGFPWDQPGTSN. Which of the two is more likely to adopt an alpha-helical structure? Why? 26. A beta strand is a stretch of residues in the extended conformation that can participate in a beta sheet. (In the figure at right, beta strands A and B participate in a two-strand sheet.) What sorts of hydrogen bonds are required for the formation of single beta strands and for the formation of beta sheets? backbone- backbone sidechain...
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