HEADER PROTEIN TRANSPORT 31-DEC-69 7AHI TITLE Substrate-engaged type 3 secretion system needle complex from TITLE 2 Salmonella enterica typhimurium - SpaR state 2 COMPND MOL_ID: 8; COMPND 2 MOLECULE: Lipoprotein PrgK; COMPND 3 CHAIN: 6A, 6B, 6C, 6D, 6E, 6F, 6G, 6H, 6I, 6J, 6K, 6L, 6M, 6N, 6O, 6P, 6Q, 6R, 6S, 6T, 6U, 6V, 6W, 6X; EXPDTA ELECTRON MICROSCOPY