Several companies on the web sell DNA and various other molecules. Below you will find a small selection of such companies.

• Isogen Bioscience
• Eurogentec
• Genset Oligos

There are also web-based companies that sell not just biological molecules but also the equipment to manipulate them.

• Glen research

Many libraries have become available online and the following pages are examples of just this: libraries of biological techniques and protocols.

• Protocol online
• Nee-How protocols