What product would you expect to be formed in the reaction of phenylalanine with ethanol in the presence of hydrogen chloride? (Do not show the amino acid as a zwitterion, show the answer as a neutral amino acid). Ph NH CH2CH3 Edit Drawing

4) What would happen if you treated Alanine (above) with an aqueous solution of: a. HCI HO b. NaOH HO NH₂ NH₂ HCI NaOH

13. Explain why the dansyl chloride treatment of a single polypeptide chain followed by its complete acid hydrolysis yields several dansylated amino acids.

Give the proper explanation of the correct option and explanation of the incorrect options will upvote No need to upload any image

Please provide the solution to the attached question

Proline is the only naturally occurring amino acids that can exist in two conformational states referred to as cis and trans proline when incorporated into peptides. a) Draw the cis and trans conformations of the proline containing tripeptide NH(Fmoc)-Val-Pro- Trp-COОH b) In most cases the trans proline amid conformation is preferred. Design two proline mimetics that allow to populate preferably the cis amide rotamer conformation of proline in tripeptide NH(Fmoc)-Val-Pro-Trp-COOH c) Outline strategies that can be used to populate the cis amide state of other amino acids. Use the amino acid ornithine as an example

Please don't provide handwriting solution

In greater details, what main difference would you see when conducting the nitrous acid test with aniline vs. amino-cyclohexane? Be specific.

Give a clear handwritten answer with explanation..

Multiple Choice question a peptide bond forms when an amino group attacks .......... group ? (a) N-glycosidic  (b) sulfhydril (c) acyl (d) enol (e) phosphate