All living organisms are composed of the same types of substances, namely water, inorganic ions, and organic compounds. The organic compounds including carbohydrates, lipids, proteins, and nucleic acids are often called biomolecules. Biochemical studies of biomolecules start with isolation and purification, the chromatographic techniques that are the most commonly employed. The most informative method to investigate structures of biomolecules is spectroscopic techniques. The computational adjuncts to these techniques are presented. The Internet search for biomolecu-lar structures and information is described.
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