Type IV secretion systems (T4SSs) comprise 12 protein components, VirB1–VirB11 and VirD4. VirB2 forms a pilus and is co-purified with VirB5. VirB4, VirB11 and VirD4 are ATPases powering pilus assembly ...
The use of a building or civil engineering structure may change throughout the course of its service life - for example, its function can change, loads can increase or higher building standards become ...
In this paper, William C. Greenwalt presents a proposed taxonomy of innovation terms that can be arranged into a larger explanatory model of defense innovation. After outlining the case for a ...
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