guanosine 5'-o- ( 3-thiotriphosphate ) ( gtp gamma s ) and the two diastereoisomers of guanosine 5'-o- ( 2-thiotriphosphate ) ( gtp beta s ) were prepared enzymatically , and their interactions with tubulin and microtubule-associated proteins ( maps ) in 0.1 m 2- ( n-morpholino ) ethanesulfonate , 0.5 mm mgcl2 were examined .
C0079469
gtp gamma s
C0018353
gtp