| Electron affinity || -53 kJ/mol
Technetium () is the lightest chemical element with no stable isotope . It has atomic number 43 and is given the symbol Tc. The chemical properties of this silvery grey, crystalline transition metal are inte more
History of saffron
fresco from the excavation of Akrotiri on the Aegean island of Santorini .
The history of saffron in human cultivation and use reaches back more than 3,000 years. and spans many cultures, continents, and civilizations. Saffron , a spice derived from the dried stigmas of t more
Enzyme inhibitor protease in a complex with the protease inhibitor ritonavir . The structure of the protease is shown by the red, blue and yellow ribbons. The inhibitor is shown as the smaller ball-and-stick structure near the centre. Created from PDB 1HXW .
Enzyme inhibitors are molecule s that more
DNA repair refers to a collection of processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome . In human cells, both normal metabolic activities and environmental factors such as UV light can cause DNA damage, resulting in as many as 1 mil more
Exosome complex below.
The exosome complex (or PM/Scl complex, often just called the exosome) is a multi-protein complex , capable of degrading various types of RNA s. Exosome complexes can be found in both eukaryotic cells and archaea , while in bacteria a simpler complex called the degradosom more