Biology, Structure of an Amino Acid

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…a fast train, which transports people faster) (A protein is like the ensemble of different wagons (different amino acids) of a whole train) (Each wagon (each amino acid) is connected by a Or similar to a peptide bond in an amino acid. Finally, both carboxyl and amino end groups of the amino acid is like different end (or motor head) of a train. ------------------------------------------------------------------------ **Bibliography** Thanks to my biology teacher Paul Anderson about his comments...