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Chapter 24: Problem 61

Draw the two possible heterodimeric dipeptides formed by condensation reactions between glycine and alanine.

Short Answer

Expert verified
The two possible heterodimeric dipeptides formed by condensation reactions between glycine (Gly) and alanine (Ala) are: 1. Glycine-Alanine (Gly-Ala): \(H_2N-CH_2-CO-NH-CH(CH_3)-COOH\) 2. Alanine-Glycine (Ala-Gly): \(H_2N-CH(CH_3)-CO-NH-CH_2-COOH\)

Step by step solution

01

Draw the structures of glycine and alanine.

First, draw the structures of both glycine and alanine, which are the two amino acids involved in the condensation reactions. Glycine is the simplest amino acid with an H atom as its side chain and alanine has a CH3 group as its side chain. The general structure of an amino acid consists of a central carbon atom (α-carbon), an amino group (NH2), a carboxyl group (COOH), and a side chain (R). The structures of glycine and alanine are as follows: Glycine (Gly): H2N-CH2-COOH, with R = H Alanine (Ala): H2N-CH(CH3)-COOH, with R = CH3
02

Perform condensation reactions between glycine and alanine.

In a condensation reaction between two amino acids, the amino group of one amino acid reacts with the carboxyl group of the other amino acid, resulting in the loss of water (H2O) and the formation of a peptide bond. There are two possible condensation reactions between glycine and alanine: 1. Glycine-Alanine (Gly-Ala): The amino group on glycine reacts with the carboxyl group on alanine. 2. Alanine-Glycine (Ala-Gly): The amino group on alanine reacts with the carboxyl group on glycine.
03

Draw the structures of the resulting heterodimeric dipeptides.

Now, we'll draw the structures of the two heterodimeric dipeptides formed by the condensation reactions between glycine and alanine, as described in Step 2. 1. Glycine-Alanine (Gly-Ala): The dipeptide structure resulting from the condensation reaction between the amino group on glycine and the carboxyl group on alanine is: H2N-CH2-CO-NH-CH(CH3)-COOH 2. Alanine-Glycine (Ala-Gly): The dipeptide structure resulting from the condensation reaction between the amino group on alanine and the carboxyl group on glycine is: H2N-CH(CH3)-CO-NH-CH2-COOH These are the two possible heterodimeric dipeptides formed by condensation reactions between glycine and alanine.

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Most popular questions from this chapter

An unknown organic compound is found on elemental analysis to contain $72.0 \%\( carbon, \)12.0 \%\( hydrogen, and \)16.0 \%$ oxygen by mass. It has a molecular weight of \(100 \mathrm{~g} / \mathrm{mol}\) and is slightly soluble in water. Upon careful oxidation it is converted into a ketone which contains \(73.4 \%\) carbon, \(10.3 \%\) hydrogen, and \(16.3 \%\) oxygen by mass. Indicate two or more reasonable structures for the unknown.

Name or write the condensed structural formula for the following compounds: (a) cis-2-pentene (b) 1,6-dichloro-3-hexyne (c) \(\mathrm{BrC} \equiv \mathrm{CBr}\) (d) 1,3 -Benzenediol (e) $\mathrm{CH}_{2}=\mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}=\mathrm{CH}_{2}$

Describe the intermediate that is thought to form in the addition of a hydrogen halide to an alkene, using cyclohexene as the alkene in your description.

Describe two ways in which the octane number of a gasoline consisting of alkanes can be increased.

Draw all the possible noncyclic structural isomers of $\mathrm{C}_{5} \mathrm{H}_{10}$ Name each compound.
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