beryllium fluoride ( bef3- ) has previously been shown to bind tightly to microtubules as a structural analogue of pi and to mimic the gdp-pi transient state in tubulin polymerization [ carlier , m.-f. , didry , d. , melki , r. , chabre , m. , & pantaloni , d. ( 1988 ) biochemistry 27 , 3555-3559 ] .
C0026046
microtubules
C0041348
tubulin