Type III secretion systems (TTSSs) mediate translocation of virulence factors into host cells. We report the 17-angstrom resolution structures of a central component of Salmonella typhimurium TTSS, ...

Here’s how to change the needle, nozzle, and/or air cap on your spray gun for wood finishing applications. 1. Remove the fluid knob at the rear of your spray gun. 2. Remove the needle spring. 3.