277 articles from WEDNESDAY 20.5.2020

Untangling a key step in photosynthetic oxygen production

Photosystem II is a protein complex in plants, algae and cyanobacteria that is responsible for splitting water and producing the oxygen we breathe. Over the past few years, an international collaboration between scientists at the Department of Energy's Lawrence Berkeley National Laboratory, SLAC National Accelerator Laboratory and several other institutions have been able to observe various steps...

Nasa space treaty to allow establishment of lunar 'safety zones'

US accused by Russia of trying to circumvent 1967 treaty banning ownership of areas of the moonCountries joining Nasa’s exploration of the moon will be asked to sign up to a series of guiding principles known as the Artemis accords. Announced on 15 May, the accords are a set of broad themes that the agency hopes will form the basis of agreements to be negotiated with each country involved in the...

Epigenetic mechanisms of blood cell differentiation

In the bone marrow, blood stem cells via precursor cells give rise to a variety of blood cell types with various functions: white blood cells, red blood cells, or blood platelets. In which cell type a cell develops depends on various factors. The correct dosage of the enzyme MOF at the right time triggers developmental programs in blood stem cells and precursor cells, and the cells differentiate...