What is the name of this oligopeptide? Use the three letter and one letter nomenclature of the amino acids. Based on the charges on the peptide, what is the closest pH range would you expect that this was in? 2 to 4? 6 to 8? 10 to 12?

For the amino acid alanine, the major species in solution at pH 7 is the zwitterionic form, which has a negatively charged carboxylic acid group and a positively charged amino group. There is a less common neutral form in which neither group is charged. The carboxylic acid group of alanine has a p?a of 3 The amino group of alanine has a p?a of 8 Estimate the ratio of the concentration of the neutral amino acid species to the zwitterionic species at pH 7.   __?__x10^?

Alanine (HA) is a diprotic amino acid with Kal = 4.53 x 10-3 and K₁2 = 1.36 x 10-10. Determine the pH of each of the solutions. A 0.241 M alanine hydrochloride (H₂A+CI-) solution. pH = A 0.241 M alanine (HA) solution. pH = A 0.241 M sodium alaninate (Na+ A¯) solution. pH =

please draw and the name of the R groups for all 20 amino acids.

Explain why casein precipitates when vinegar is added. Why was milk or raw egg once used as an antidote in cases of heavy metal poisoning? Based on your isolated yield of casein, how many grams of the protein are in one 200 g glass of milk? Which of the solutions contained amide bonds? Which test tells you this? Which of the solutions contained compounds with primary amino groups? Which test tells you this? Describe two examples of protein folding patterns and identify what level of protein structure they belong to. What other reagents might you use besides ferric chloride to test affinity for metal ions?

6. Is this amino acid L- or D-, and how can you tell? Н -ŅH3 CH3 a. D-, because all amino acids are D. b. D-, because the amine is on the right. c. D-, because the amine is on the left. d. L-, because the amine is on the left.

Determine the molecular formula and calculate the molar mass (in g/mol) of histidine, the essential amino acid. The formula should be entered as CwHxNyOz (for example C2H2N2O2, omit coefficient if equal to 1), followed by other element if any. Molecular formula is . ord NH₂ N H molar mass is OH

Proteins are polymers in which unbranched chains of amino acids are present. branched chains of amino acids are present. both unbranched and branched chains of amino acids are present. alternating amino acid and glucose monomer units are present. fewer than 50 amino acids are present.

Alanine is a diprotic amino acid with a pKa = 2.344 for the carboxylic group and a pKa = 9.868 for the ammonium group. Estimate the pH of a solution of 0.340 M alanine. Answer using two significant figures.

8. From Figure 3, identify the noncovalent force that dominates between the two interacting functional groups indicated by the blue letters d. а. b. е. С.