Expression, limited proteolysis and preliminary crystallographic analysis of IpaD, a component of the Shigella flexneri type III secretion system. - Johnson, S; Roversi, P; Espina, M; Deane, J; Birket, S; Picking, W; Blocker, A; Picking, W; Lea, S (Acta crystallographica. Section F, Structural biology and crystallization communications, 2006)