Exam 26: Biomolecules: Amino Acids,peptides,and Proteins

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ an octapeptide with a C-terminal valine.

Exhibit 26-4 Refer to the data below to answer the following question(s): Porcine dynorphin is a neuropeptide having 17 amino acid residues.Its structure is shown below. Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln -Refer to Exhibit 26-4.What fragments would result if dynorphin were cleaved by chymotropsin?

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Show the alkyl halide you would use to prepare leucine by the amidomalonate method.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.What is the pI of leucine?

Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. A B C

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.How many possible stereoisomers of leucine are there?

Consider the image below. What type of interaction is indicated by the arrow?

The most acidic amino acid is ____.

What alkyl halide should be used to prepare the following amino acid by the amidomalonate method? Atoms other than carbon and hydrogen are labeled.

The enzyme that would catalyze the following reaction ​ would belong in which classification?

Consider the following titration curve for an amino acid. What is the pI of this amino acid?

The most basic amino acid is _____.

The following amino acid: (Atoms other than carbon and hydrogen are labeled. )

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Draw a Fischer projection of L-leucine and label the chirality center(s) as R or S.

Define isoelectric point.

Consider the following titration curve for an amino acid. At which of the following "pH" values would the amino acid have a net charge of zero?

Exhibit 26-5 Refer to the data below to answer the following question(s): The octapeptide saralasin is a specific antagonist of angiotensin II.A derivative of saralasin is used therapeutically as an antihypertensive.Amino acid analysis of saralasin show the presence of the following amino acids: Ala,Arg,His,Pro,Sar,Tyr,Val,Val -Refer to Exhibit 26-5.Sar is the abbreviation for sarcosine,N-methyl aminoethanoic acid.Draw the structure of sarcosine.

On the titration curve for an amino acid.In terms of the letters on the graph,label the isoelectric point,the pK_a of the amino group and the pK_a of the carboxyl group.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Draw the condensed structure for leucine,and label all chirality centers with an asterisk.

The coenzymes NAD⁺ and FAD are involved in: