The Type III Secretion System (T3SS) is a macromolecular complex used by Gram-negative bacteria to secrete effector proteins from the cytoplasm across the bacterial envelope in a single step. For many pathogens. the T3SS is an essential virulence factor that enables the bacteria to interact with and manipulate their respective host. A characteristic structural feature of the T3SS is t... https://www.chiggate.com/3m-speedglas-9002nc-welding-helmet-fashion/