3H7X A TRANSITION FROM STRONG RIGHT-HANDED TO CANONICAL LEFT-HANDED SUPERCOILING IN A CONSERVED COILED COIL SEGMENT OF TRIMERIC AUTOTRANSPORTER ADHESINS - THE WILDTYPE STRUCTURE CELL ADHESION, YADA, ADHESIN, ADHESION, COILED COIL, CELL MEMBRANE, CELL OUTER MEMBRANE, MEMBRANE, PLASMID, VIRULENCE