A 3D molecular model of teixobactin, an antibiotic effective against gram-positive bacteria that are normally resistant to antibiotic drugs. Teixobactin was discovered in early 2015 by using a miniature iChip device to screen uncultured bacteria in samples of soil, exposing the bacteria to soil nutrients and growth factors. Antibiotic-resistant bacteria such as Staphylococcus aureas, Streptococcus pneumoniae, MRSA, Mycobacterium tuberculosis, Clostridium difficile and Bacillus anthracis are particularly vulnerable to teixobactin. Atoms are colored dark gray (carbon), light gray (hydrogen), red (oxygen), and blue (nitrogen).