Birth control for centrioles

Birth control for centrioles

You wouldn't call it a long-term relationship, but the interaction between proteins and certain membrane lipids is not just a one-millisecond stand. As Hammond et al. discovered, the proteins remain attached to the lipids longer than researchers expected. The fi ndings explain how these lipids localize their effects. By temporarily hooking up with various proteins, inositol lipids in the plasma...

Birth control for centrioles

In This Issue In This Issue Birth control for centrioles mnis centriolus e centriolo—every centriole comes from a centriole. This statement underlies the standard model of centrosome duplication, in which daughter centrioles that will form the foundation of a new centrosome must be patterned on some kind of template provided by a mother centriole. On page 1171, Khodjakov et al. now demonstrate ...

Birth control for giants

The standard Erdős-Renyi model of random graphs begins with n isolated vertices, and at each round a random edge is added. Parametrizing n2 rounds as one time unit, a phase transition occurs at t = 1 when a giant component (one of size constant time n) first appears. Under the influence of statistical mechanics, the investigation of related phase transitions has become an important topic in ran...

Building centrioles

he protozoan parasite Toxoplasma gondii heads out of its host cell when Ca 2 ϩ levels peak in its cytoplasm. Now, Arrizabalaga et al. (page 653) find that proper regulation of these Ca 2 ϩ levels, and thus of Toxoplasma exit, requires a Na ϩ /H ϩ exchanger (NHE), suggesting a link between proton and Ca 2 ϩ regulation. The increase in Ca 2 ϩ levels, which can be induced artificially with an iono...

[Birth control].