HEADER PROTEIN TRANSPORT 31-DEC-69 7AH9 TITLE Substrate-engaged type 3 secretion system needle complex from TITLE 2 Salmonella enterica typhimurium - SpaR state 1 COMPND MOL_ID: 9; COMPND 2 MOLECULE: Protein PrgH; COMPND 3 CHAIN: 7A, 7B, 7C, 7D, 7E, 7F, 7G, 7H, 7I, 7J, 7K, 7L, 7M, 7N, 7O, 7P, 7Q, 7R, 7S, 7T, 7U, 7V, 7W, 7X; EXPDTA ELECTRON MICROSCOPY