Today (4/25) is national DNA day. Digital World Biology™ is celebrating by sharing some of our favorite structures of DNA. We created these photos with Molecule World™ a new iPad app for viewing molecular structures.
As we are taught in school, the double stranded DNA molecule is a right-handed helix as determined by Watson and Crick using Franklin's x-ray diffraction images . This B- ... Read more
Do other organisms make antibiotics?
As far as I can tell, most of the commercially produced antibiotics are made by bacteria, fungi, and a bit chemistry (more on that in a moment).
It appears, however, that compounds with antimicrobial properties are made by just about everything. Just to make things complicated, these molecules are sometimes called "antibiotics" in the literature and sometimes they're not. Many of the molecules with antimicrobial activity are short peptides–chains of amino acids between 10 and 50 residues long (1 ... Read more