Nature has evolved clever ways to prevent animals from different species from successfully reproducing. As published in the upcoming issue of Genes & Development, molecular biologists at UC Irvine are gaining a better understanding as to how.
In the October 15th issue, Drs. Noriko Kamei and Charles Glabe report on the identification of a receptor on the surface of sea urchin eggs that regulates the species-specific adhesion of sperm.
External fertilization can be risky business, especially for marine animals whose sperm is released into an aqueous environment. Thus, there are several barriers to prevent cross-fertilization between different species of sea urchins, or even, say, sea horse sperm from fertilizing sea urchin eggs. The recognition of egg and sperm involves a number of steps (sperm attraction, activation, and adhesion to the egg surface), each of which serves as a checkpoint to restrict the gene pool to individuals of the same species.
Heather Cosel | EurekAlert!
BigH1 -- The key histone for male fertility
14.12.2017 | Institute for Research in Biomedicine (IRB Barcelona)
Guardians of the Gate
14.12.2017 | Max-Planck-Institut für Biochemie
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
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14.12.2017 | Physics and Astronomy
14.12.2017 | Life Sciences
14.12.2017 | Life Sciences