comparison zampanolide
zampanolide
vineblastin
epithilone
zn2+
Mg2+
GTP ligand binding site
superposition
Arg156
Arg214
tyr-202
rotation
pro-274, etc
Taxol Val-23
taxol
secondary structure
Subunits
gtp critical residues
GDP Ligand
GTP lys-254
gtp ligand binding site