| Orthovanadate ( 5 ( 1 ) ) and fluoroaluminate ( AlF ( 10 ) ) trap nucleotide in one NBD by forming stable catalytically inactive complexes ( Pgp M2+ ADP 10 ) , which are proposed to resemble the catalytic transition state , whereas the complex formed by beryllium fluoride ( BeF ( 10 ) ) is proposed to resemble the ground state . ^^^ |