Christopher K. Mathews is Distinguished Professor and Chairman of the Department of Biochemistry and Biophysics at Oregon State University. He has published several books and more than 125 scientific papers dealing with molecular virology, metabolic regulation, nucleotide enzymology, and biochemical genetics. K.E. van Holde is Distinguished Professor Emeritus of Biophysics and Biochemistry at Oregon State University. He has received Guggenheim, NSF, and EMBO Fellowships and is the author of two books and more than 175 scientific papers. Kevin Ahern is a Senior Instructor in the Department of Biochemistry and Biophysics at Oregon State University, where he pioneered the development of Web-based courses for teaching biochemistry. He is a contributing editor to Science magazine and a columnist for Genetic Engineering News.