Just Uploaded lehninger 4rth edition from torrent! This is one of my favourite biochemistry textbooks! If you want the hard cover, you can always get it at bookstores or amazon. I love free ebooks :-) ... so will be uploading some more later! Please feel free to download it @ Lehninger Biochemistry 4e (2005).pdf or Alternate Download Site [Right click on the link and save as target to your destination folder] Additional Information http://bcs.whfreeman.com/lehninger/default.asp?s... Read Full Story

Photobacterium phosphoreum (Vibrio phosphoreum) is a gram-negative luminescent marine bacterium. It lives in symbiosis with marine organisms. When grown in lab, at 20 degree celsius, it emits a bluish-green light (490 nm). The principle behind bioluminescence is a chemical reaction between FMN, luciferin and molecular oxygen catalysed by Luciferase enzyme. Figure 1.: Principle of Bioluminiscence. Cartoon by Paul Steve. © National Centre for Biotechnology Education, 1993 Bioluminescence has... Read Full Story

Ames test, developed by Bruce Ames, is a widely used rapid and less-expensive screening test for potential mutagens. Figure 1. The Ames test for mutagenicity. The test uses a strain of Salmonella bacteria that require histidine in the medium because of a defect in a gene necessary for histidine synthesis. Mutagens can cause a further change in this gene that reverses the defect, creating revertant bacteria that do not require histidine. To increase the sensitivity of the test, the bacteria... Read Full Story