All L amino acids have an S absolute configuration except L-cysteine, which has the R configuration. L-cysteine is designated as having the R absolute configuration needs to be explained. Concept introduction: Amino acids are so named because they all are weak acids. All amino acids have at least two dissociable hydrogens, (diprotic), and some have three dissociable hydrogens and are triprotic.

Question

Want to see the full answer?

Answer 1

Question

Chapter 2, Problem 30P

Interpretation Introduction

Interpretation:

All L amino acids have an S absolute configuration except L-cysteine, which has the R configuration. L-cysteine is designated as having the R absolute configuration needs to be explained.

Concept introduction:

Amino acids are so named because they all are weak acids. All amino acids have at least two dissociable hydrogens, (diprotic), and some have three dissociable hydrogens and are triprotic.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Accepting. Which of the following compounds readily accepts amino groups from amino acids? a. Glutamine b. Isocitrate c. Malate d. a-Ketoglutarate-Ketoglutarate

Be sure to answer all parts. Give the amino acid sequence of an octapeptide that contains the amino acids Val, Met, Asp (2 equiv), Phe, Trp, Ile, Lys, and forms the following fragments when partially hydrolyzed with HCl: Ile-Asp-Phe, Lys-Met-Val-Trp, and Phe-Asp-Lys-Met. Trp Leu Phe Leu Val Lys Gly Tyr X

Be sure to answer all parts. Draw the s-trans and s-cis conformations of the peptide bond in the dipeptide Ala-Ala. Be sure to show appropriate stereochemistry for the natural amino acid and the alkenes. I I I I I draw structure... s-trans draw structure ... s-cis