Biology

Listings
Metkinen Chemistry provides unique reagents for DNA and RNA synthesis.
http://www.metkinenchemistry.com/
Biology web directory and biology search engine. Free resources for biology related information, terms, references, companies, services etc. online.
http://www.biologydir.com/
PLOS Biology is an open-access, peer-reviewed journal that features works of exceptional significance in all areas of biological science, from molecules to ecosystems, including works at the interface with other disciplines.
http://www.plosbiology.org/