Single crystals of 70S ribosomes from Thermus thermophdus and from the wild-type and a mutant of Bacdlus stearothermophdm have been obtained. Using synchrotron X-ray beam, these crystals diffract to 19 ,~ and 35 A, respectively, and can be ~rradlated at temperatures of 110-120 K for days without noticeable decay Diffraction data sets to 22 ,~ and to 33 A with reasonable R scale v, ere collected...

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Old BS 1619 2 ml glass insulin syringe (U20 insulin) + 26 gauge, 0-5 inch needle 1-26 (U20), (Everett) 0-063 2-52 (U40) New BS 1619 1 ml glass insulin syringe (UIOO insulin) + 26 gauge, 0-5 inch needle (Rand Rocket) 0-051 5 1 (UIOO) New BS 1619 0 5 ml glass insulin syringe (UI00 insulin) + 26 gauge, 0-5 inch needle (Rand Rocket) 0-05 5 (U100) BD Plastipak 1 ml plastic disposable syringe (U100 i...

9 We analyze the joint evolution of an ecological character and of dispersal distance in asex10 ual and sexual populations inhabiting an environmental gradient. Several interesting 11 phenomena resulting from the evolutionary interplay of these characters are revealed. First, 12 asexual and sexual populations exhibit two analogous evolutionary regimes, in which either 13 speciation in the ecolo...