Questions from Organic Chemistry

Q: Using three-letter abbreviations, identify all possible acyclic tripeptides containing

Using three-letter abbreviations, identify all possible acyclic tripeptides containing L-leucine, L-methionine, and L-valine.

Q: Draw the predominant form of Asp-Lys-Phe at physiological

Draw the predominant form of Asp-Lys-Phe at physiological pH.

Q: Draw a bond-line structure of the peptide that corresponds with

Draw a bond-line structure of the peptide that corresponds with the following sequence of amino acid residues and identify the N terminus and C terminus: Trp-Val-Ser-Met-Gly-Glu

Q: Methionine enkephalin is a pentapeptide that is produced by the body to

Methionine enkephalin is a pentapeptide that is produced by the body to control pain. From the sequence of its amino acid residues, draw a bondline structure of methionine enkephalin.

Q: 91. What is the major product of this reaction?

91. What is the major product of this reaction? 92. Which structure is NOT an intermediate in the following reaction? 93. Which reagents can be used to make this compound?

Q: From its amino acid sequence, draw the form of aspartame that

From its amino acid sequence, draw the form of aspartame that is expected to predominate at physiological pH: Asp-Phe-OCH3

Q: It is believed that penicillin antibiotics are biosynthesized from amino acid precursors

It is believed that penicillin antibiotics are biosynthesized from amino acid precursors. Identify the two amino acids that are most likely utilized during the biosynthesis of penicillin antibiotics:...

Q: Green fluorescent protein (GFP), first isolated from bioluminescent jellyfish,

Green fluorescent protein (GFP), first isolated from bioluminescent jellyfish, is a protein containing 238 amino acid residues. The discovery of GFP has revolutionized the field of fluorescence micros...

Q: Propose two structures for a tripeptide that contains glycine, L-

Propose two structures for a tripeptide that contains glycine, L-alanine, and L-phenylalanine, but does not react with phenyl isothiocyanate.

Q: Bradykinin has the following sequence: (N terminus) Arg

Bradykinin has the following sequence: (N terminus) Arg-Pro-Pro-Gly-Phe-Ser-Pro-Phe-Arg (C terminus) Identify all fragments that will be produced when bradykinin is treated with: a. Trypsin b. Chym...