Science News for November 20, 1998

Where The Air We Breath Comes From

Scientists have identified a close evolutionary connection between the photosynthetic reaction centre of bacteria and that of higher plants. Photosystem II in plants is a multi-enzyme complex comprising over 25 different proteins, which work together to convert sunlight into biochemical energy.

SourceMax-Planck-Gesellschaft·JournalNature·DateNov 20, 1998

Study Of Origin Of Species Enters The Molecular Age

Researchers at the University of Chicago have discovered a gene that causes male progeny of two recently separated species to be sterile, hinting at an early indicator of speciation. The homeobox gene is evolving rapidly due to its role in controlling male sexual function, leading to sibling species incompatibility.

SourceUniversity of Chicago·JournalScience·DateNov 20, 1998