glucose 6-phosphate dehydrogenase (g6pd) from streptomyces aureofaciens was purified and denatured in 6 m urea. denaturation led to complete dissociation of the enzyme into its inactive monomers, 98% loss of the enzyme activity, about 30% decrease in the protein fluorescence and a 10 nm red shift in the emission maximum. dilution of urea-denatured enzyme resulted in regaining of the enzyme acti...

In 1916, Einstein postulated the existence of induced emission (einstrahlung), where a quantum of radiation from a light beam induced a molecule in an excited state to emit a quantum of radiation of the same frequency. The stimulating photon was unchanged by the ghostly interaction and the net effect of induced emission, which is now commonly known as stimulated emission, was indistinguishable ...