Organic chemistry had its genesis in the study of naturally occurring substances, and this remains a constant source of information and intellectual challenge. In this section some of the most interesting and important classes of natural products will be discussed.

At various points throughout this text, links to supplementary information or special topics will be located in shaded boxes of this kind.

The following problems focus on concepts and facts associated with the trearment of natural product chemistry in this text.

Choose a Problem Identifying Natural Products Aldohexose Configurations Stereoisomer Notation in Monosaccharides The Wohl Degradation of Monosaccharides Pyranose & Furanose Forms of Monosaccharides Stereoisomers of Inositol Disaccharide Structures Triglycerides Triglyceride Chirality The Isoprene Rule Structure of Terpenes Properties of Amino Acids Primary Structure of a Peptide

Many excellent web sites devoted to various aspects of biochemistry exist. Instructional tutorials combined with molecular model visualization have been created and implemented. Some of the sites have self testing quizzes. The following list is far from complete, but it contains links to pages which enhance and extend the treatment of topics provided in this text.

Carbohydrates
	Monosaccharide Browser	Jon Maber, Terra Vivida
Lipids
	Lipid Membranes	Eric Martz, Univ. Mass. Amherst cf. H Heller, M Schaefer, & K Schulten, J. Phys. Chem. 97:8343-60, 1993.
Amino Acids
	Amino Acid Quizzer	Eric Martz, Univ. Mass. Amherst cf. H Heller, M Schaefer, & K Schulten, J. Phys. Chem. 97:8343-60, 1993.
	Amino Acid Titration	Edward K. O'Neil and Charles M. Grisham The University of Virginia in Charlottesville, Virginia.
Peptides & Proteins
	Introduction to Protein Structure	FranK Gorga, Bridgewater State College, MA
	Introduction to Protein Structure	Victoria Bragin, Pasadena City College, CA
	Protein Explorer	Eric Martz & Bob Hansen
	Carboxypeptidase Tutorial	E. Morgan, Curtin University of Technology
	Hemoglobin Tutorial	Eric Martz, Univ. Mass. Amherst
DNA
	DNA Structure	Eric Martz, Univ. Mass. Amherst
	DNA Structure	Frieda Reichsman, Univ. Mass. Amherst
General Resources
	Protein Databank	Research Collaboratory for Structural Bioinformatics (RCSB)
	Chime & Jmol Models	A large assortment of Chime models of biologically important compounds