Calculators Online - Links to a huge number of interactive calculators, from chemistry and engineering to agriculture and statistics. Useful entries include a DNA/RNA concentration calculator and a PCR primer design calculator.
Medline Workbench - Search Evaluated Medline, PubMed or AbstractsFinder all from the same page. You can also sign up to receive a free daily update of your PubMed queries via e-mail and get access to a number of free online journals.
Molecular Biology Notebook Online - An excellent collection of course materials for the teaching of Molecular Biology. Designed primarily for undergraduates.
NIH Office of Extramural Research - Stats and information about NIH grants, as well as a searchable database (CRISP) of federally supported research projects.
WebElements Periodic Table - An interactive periodic table. Includes a short background and description, along with uses, electronic properties, physical properties, and crystal structures for each element. There are even nerdy science cartoons and a few short movies.

Art's Biotech Resources - An outstanding metalist of molecular biology, biochemistry, biophysics and bioinformatics sites. Includes links to protocols, tutorials, software and databases.
BioChemNet - A list of biology and chemistry educational resources.
Biocrawler - A life science search engine, with links to current life science news.
Biology Links - An extensive list of links to biochemistry, molecular biology and immunology resources from the Harvard University Dept of Molecular and Cellular Biology.
Buffers Introduction - Includes a a detailed discussion of buffers and buffer theory, as well as a useful application that generates buffer recipes based on your input parameters.
Cell & Molecular Biology Online - An annotated metalist of resources for molecular and cellular biologists. Includes links to protocols, codon usage and periodic tables, and education resources.
DNA Learning Center - An excellent educational resource, geared toward students and nonscientists, for information about genes. Check out DNA From the Beginning, an animated primer on the basics of DNA, genes and heredity.
Indiana University Bio Archive - A collection of software (free!) and data for molecular biology and related areas.
The National Biotechnology Information Facility (NBIF) - A dizzying number of links to research tools and databases related to the life sciences.
National Center for Biotechnology Information (NCBI) - A national resource for molecular biology information from the National Library of Medicine and NIH. This is the home of the popular Entrez databases. You can search PubMed, submit your sequence to GenBank, perform BLAST searches and get genome information on a number of different organisms.
Primer 3 - An interactive, forms-based tool for designing primers from an input DNA sequence.
The Bio Sciences Virtual Library - A metalist of resources categorized by life science field.

Baylor College of Medicine Search Launcher - Search multiple databases with a single input nucleic acid or protein sequence. You can also get secondary structure predictions based on sequences.
Molecules R Us Utility - A searchable PDB database of protein and nucleic acid structures.
Nucleic Acid Database - An X-ray structure database of nucleic acids and nucleic acid-containing structures. Includes an interface to search nucleic acid-containing NMR structures.
Protein Data Bank - A searchable database of 3-D macromolecular structures.
Single Nucleotide Polymorphisms for Biomedical Research - A public database of single nucleotide polymorphisms (SNPs) within the human genome.

Biowire - A resource for user-written reviews of life science products. Requires membership (free).
Comprehensive Protocols Collection - Various molecular biology protocols collected by the Ambros lab at Dartmouth College.
Molecular Biology Protocols - A collection of basic protocols on the most popular molecular biology techniques. From the Northwest Fisheries Science Center.
Molecular Biology Techniques Forum - A forum for reader-submitted techniques, tips and questions concerning molecular biology. Run by the Northwest Fisheries Science Center.
PCR and Multiplex PCR: Guide and Troubleshooting - A very informative guide to PCR, including discussions of parameters influencing PCR, troubleshooting advice and PCR applications. Also includes links to a discussion of FISH (fluorescent in situ hybridization) and CCK (color changing karyotyping).
The Polymerase Chain Reaction (PCR) Jump Station - Bills itself as "the ultimate Web page for information and links on all aspects of the Polymerase Chain Reaction (PCR)," which is actually a pretty good description of its offerings.
Protocols for Recombinant DNA Isolation, Cloning and Sequencing - An extensive protocol collection of common methods (mostly DNA related) used in molecular biology laboratories. The appendix contains useful information tidbits, such as units and formulas, DNA mobility in gels and consensus sequences in nucleic acids. From Bruce Roe's lab at the University of Oklahoma.
Science Exchange Protocols - A collection of molecular biology, molecular immunology, immunochemistry and immunology protocols submitted from researchers around the world.

RNA - The official journal of the RNA Society.
RNA Analysis Tools - A list of tools to predict RNA secondary structure, as well as distances, specific heat and energy of RNA secondary structures.
RNA Editing Web Site - A wealth of information on all the various types of RNA editing. Includes a bulletin board and links to related Web sites, databases and jobs available.
The RNA Society - A FASEB organization. Get information about the RNA Society annual meeting and upcoming events.
Free Energy and Enthalpy Tables for RNA Folding - A collection of tools and tables for estimating the free energies of various RNA secondary structures. From D.H. Turner's lab at the University of Rochester.
Nylon MicroArrays - A good introduction to cDNA microarrays and macroarrays, which are used to measure gene expression levels.
The RNA Modifications Database - A comprehensive listing of post-transcriptionally modified nucleosides from RNA.
The RNA World at IMB-Jena - Perhaps the best metalist of RNA related topics on the Web. Includes links to structure and sequence databases, protocols, software and tutorials.
TRANSFAC (The Transcription Factor Database) - Information on transcription factors, such as classifications, recognition sequences, amino acid sequences and references. You can search for transcription factor recognition sites in your DNA sequences.

Bay Area RNA Club - San Francisco, CA.
Cambridge University RNA Club - Cambridge, UK.
Great Lakes RNA Club - Wayne State University, Detroit, MI.
NC State RNA Biology Group - Raleigh, NC.
The RNA Interest Group - The NIH RNA club.
Scottish RNA Club - Scotland.
University of Texas RNA Club - Austin, TX.

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