Bacitracin A is produced by bacteria and therefore contains some residues that are not from the list of 20 naturally occurring amino acids (See the following figure).

(a) Identify which amino acid residues are found in the following table and name them.

(b) Identify which of these amino acids are d rather than l.

(c) Identify all residues that are not listed in the following table.

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Amino acid Amino acid Protein FO- н н, N-C- Гон н सरद्द द्ब Name Structure Abbreviation Name Structure Abbreviation Amino acids with nonpolar si de chalns Amino acids with polar side chains Glycine н. Gly G HN. Asparagine он Asn N NH2 NH2 Glutamine Gin Q H2N Он H3C. Alanine Он Ala A NH2 NH2 Seine но он Ser S NH2 Valine Val v он он NH2 Threonine Thr T он NH3 Leucine он Leu L Туюaine он Tyr Y NH2 NH2 Cysteine HS он Cys C Isoleucine OH De I NH2 NH2 Amino acids with acidic side chains но. Aspartic acid он Asp D Methionine Он Met M NH2 NH2 Glưamic acid Giu E но он он NH2 Proline Pro P NH Amino acids with basic side chains Arginine он Arg R Phenylalanine он Phe F NH2 NH2 Histidine он His H NH NH2 он Trр W Tryptophan NH2 Lysine H2N. Lys K он NH2