Venezuelan equine encephalitis virus (VEEV) is an unforgiving killer of horses, donkeys and zebras, resulting in mortality as high as 80 percent of infected animals. It causes rapid, catastrophic swelling of the brain and spinal cord, leading to severe neurological symptoms and—in many cases—sudden death. The virus can also infect humans, with similar results. Now a research team has exploited a weakness in VEEV's genetic code, resulting in a far less deadly mutant version of the virus when tested in laboratory mice.
Biologists are now able to show that the receptors enabling the primitive moth species, Eriocrania semipurpurella, find an individual of the opposite sex, probably evolved from receptors which help the moth perceive the fragrances of plants.
It is one of the mysteries in biology: how does a cell neatly distribute its replicated DNA between two daughter cells? Scientists are split into two camps: the first argues that condensing works like a hook, tying DNA together. The other camp thinks that the ring-shaped protein pulls the DNA inwards to create a loop. Now researchers from give the 'loop-extrustion camp' a boost: condensin does indeed have the putative 'motor power' on board.
Nitrate supplementation in conjunction with Sprint Interval Training in low oxygen conditions could enhance sport performance a study has found.