encoding proteases within any genome are easily identified, and three-dimensional structures of many proteases have been solved. Most proteolytic cleavage mechanisms and pro-tease substrate specificities have been established (the latter in some detail) 1. We are also able to block proteolytic activities with potent inhibi-tors. Transgenic approaches have been used for targeted deletions of pro...

A simple way to get cleavage o partition cellular components into dividing daughter cells, the spindle apparatus induces the formation of a cleavage furrow, but results conflict about which specific components are required for this process. By physically dissecting the spindle apparatus in grasshopper spermato-cytes, Alsop and Zhang now show on page 383 that bundled microtubules are the only st...

In this thesis the interaction of gravitational waves (gws) with electromagnetic waves (emws) in a static magnetic background field is considered. This interaction is a consequence of the general relativistic Einstein field equations. These equations dictate the excitation of electromagnetic waves when a gravitational wave interferes with a static electromagnetic background field and a similar ...