Consider the structure of the amino acid L-alanine. Which functional groups are common to all amino acids? H COOH NH₂ CH₂
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- Give the names of the 20 Common Amino Acids and draw the structure of each.Draw the stereoisomers of the following amino acids. Indicate pairs of enantiomers and pairs of diastereomers. leucineCH3CHCH2 CHCOO−CH3 +NH3 isoleucineCH3CH2CH CHCOO−CH3Find a protein of your choice (rcsb.org), choose a part of it (containing at least 30 amino acid residues), find the amino acid sequence (sequence in it), identify what functional groups the amino acid substitutes contain (carboxyl group and 2-position the Nitro group will form amide bonds, forming the covalent basic structure of the protein). What different interactions can occur between these functional groups? How will it relate to the spatial structure of the protein?
- Explain why amino acid can increase blood glucose. Write the structure of each of the following peptide at pH7 and identify how many peptide bond in each number. Alanyl-phenylalanine- aspartate- cysteine Threonyl- Isoleucyl-methionyl- leucine Lysyl-alanine -Phenylalanyl-tyrosyl- serineDraw the structural formula of a simple amino acid. What is the importance of the carboxyl group, amino group, and R group?Exercise A: Amino Acid Functional Groups Figure 1 below shows one of the 20 amino acids that make up proteins. Recall that carbon can form four covalent bonds. Amino acids consist of a central carbon, called the a-carbon, that is bonded to four different chemical groups. H + CH2 OH Figure 1. Structure of an amino acid Answer the below questions in your own document. • On the amino acid shown in Figure 1, label the a-carbon. • The a-carbon of each of the 20 amino acids is bonded to one hydrogen atom, one amino group, one carboxyl group, and one R group (more on that below). You should recognize the amino and carboxyl groups from our discussion of functional groups in organic molecules. Circle and label* the amino group and the carboxyl group in Figure 1. *Note: our goal in this question, and in similar questions throughout this lab, is for you to be able to identify specific structures. You can do this circling/labeling in whatever way is easiest for you. You might want to draw the…
- The common amino acids are polyprotic acids. All amino acids contain an amino group and a carboxyl group. Some amino acids contain ionizable side chains. The presence of an ionizable side chain creates a third ionizable group. For a diprotic amino acid such as glycine (structure shown below), three forms are possible. These forms, the fully protonated (AA*), single deprotonated (AA°), and completely deprotonated (AA) exhibit different acid-base properties. NH;+ NH,+ NH, Neutral H,A (AA+) A- (AA•) (AA-) The Ka describing the AA* and the AA° equilibrium is 4.57 x10-3, while the Ka involving AA° and the anionic form AA- is a much smaller 2.51 x 10-10, The neutral form, AA° is referred to as isoelectric glycine. All amino acids can assume the isoelectric form under proper conditions. a. Calculate the pH of a 0.1 M solution prepared from the salt glycine hydrochloride (hint: use ICE table).Name four major groups of amino acids, categorizedby the properties of their R groups. Explain how thechemical properties of each group affect protein shape.Describe the basic general structure of an l-a-amino acid,and draw its structure