Article Abstract:
The study investigated the rotation of the gamma-attached actin at low adenosine triphosphate (ATP) concentrations. This was done by fixing a subcomplex of the protruding portion of the ATP synthase onto a surface-bound bead with ten histidines linked to the amino terminus of the beta subunit. Rotation was observed using a fluorescently labeled actin filament attached to the gamma subunit. Results found that rotation of the actin was resolved into discrete 120 degree-steps with occasional back steps. A high thermodynamic efficiency was also noted in the process.
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Article Abstract:
An investigation of the effectiveness of the host plasminogen in the dissemination of Borrelia burgdorferi in ticks and for development of spirochetemia in mice was conducted. The study made use of the plasminogen (Plg)-knockout mice method. Results reveal that plasminogen is an essential requirement for the dissemination of B. burgdorferi within the tick and the development of spirochetemia in mice. However, plasminogen is an insignificant factor for transmission and infection.
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Article Abstract:
A model in which MUT-7, guided by transposon-derived dsRNA, represses transposition by degrading transposon-specific messengers and prevents thereby transposase production and transposition, is proposed. It appears that NRAi may work by dsRNA-directed enzymatic RNA degradation. One Tc1 silenced strain of C. elegans has been has been mutagenized. Mutants in which Tc1 was activated in the germline were isolated.
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