Unraveling the crystal structure of the HpaA adhesin: insights into cell adhesion function and epitope localization of a Helicobacter pylori vaccine candidate oleh Cyrielle Martini, Victoria Araba, Meriem Beniani, Paula Armoa Ortiz, Mimi Simmons, Mariem Chalbi, Abdelkader Mellouk, Majida El Bakkouri, Charles Calmettes