Two structures of tripeptide that contains glycine, L-alanine and L-phenylalanine which does not react with phenyl isothiocyanate need to be proposed. Concept introduction: Edman degradation is a chemical reaction where the N-terminus amino acid is removed when the peptide is treated with phenyl isothiocyanate followed by treatment with trifluoroacetic acid to form phenylthiohydantoin(PTH) derivative and peptide with one amino acid residue less than the starting peptide. This method can be used to identify the sequence of the amino acid in peptide as only one amino acid is removed each time forming the PTH derivative. The general scheme for Edman degradation can be shown as, Please remember that if the amino group in the amino acid is protected or not free means the reaction won’t take place. To propose : To propose two structures of tripeptides that do not react with phenyl isothiocyanate with the given amino acids.

Question

Want to see the full answer?

Answer 1

Question

Chapter 25, Problem 70PP

Interpretation Introduction

Interpretation:

Two structures of tripeptide that contains glycine, L-alanine and L-phenylalanine which does not react with phenyl isothiocyanate need to be proposed.

Concept introduction:

Edman degradation is a chemical reaction where the N-terminus amino acid is removed when the peptide is treated with phenyl isothiocyanate followed by treatment with trifluoroacetic acid to form phenylthiohydantoin(PTH) derivative and peptide with one amino acid residue less than the starting peptide. This method can be used to identify the sequence of the amino acid in peptide as only one amino acid is removed each time forming the PTH derivative. The general scheme for Edman degradation can be shown as,

Please remember that if the amino group in the amino acid is protected or not free means the reaction won’t take place.

To propose : To propose two structures of tripeptides that do not react with phenyl isothiocyanate with the given amino acids.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

1) Suppose 0.1 kg ice at 0°C (273K) is in 0.5kg water at 20°C (293K). What is the change in entropy of the ice as it melts at 0°? To produce the original "water gas" mixture, carbon (in a combustible form known as coke) is reacted with steam: 131.4 kJ + H20(g) + C(s) → CO(g) + H2(g) From this information and the equations in the previous problem, calculate the enthalpy for the combustion or carbon to form carbon dioxide. kindly show me how to solve both parts of the same long problem. Thanks

we were assigned to dilute 900ppm in to 18ppm by using only 250ml vol flask. firstly we did calc and convert 900ppm to 0.9 ppm to dilute in 1 liter. to begin the experiment we took 0,225g of kmno4 and dissolved in to 250 vol flask. then further we took 10 ml sample sol and dissolved in to 100 ml vol flask and put it in to a spectrometer and got value of 0.145A . upon further calc we got v2 as 50ml . need to find DF, % error (expval and accptVal), molarity, molality. please write the whole report. thank you The format, tables, introduction, procedure and observation, result, calculations, discussion and conclusion

Q5. Predict the organic product(s) for the following transformations. If no reaction will take place (or the reaction is not synthetically useful), write "N.R.". Determine what type of transition state is present for each reaction (think Hammond Postulate). I Br₂ CH3 F2, light CH3 Heat CH3 F₂ Heat Br2, light 12, light CH3 Cl2, light No