Formal Name: guanosine, 5′→P′′-ester with [P′′(S)]-thiotriphosphoric acid ((HO)2P(O)OP(O)(OH)OP(O)(OH)(SH)), tetrasodium salt
Purity: ≥95%
Formula Markup: C10H12N5O13P3S • 4Na
Formula Weight: 627,2
Shelf life (days): 730
Notes: Sp-Guanosine-5'-O-(1-thiotriphosphate) (Sp-GTP-α-S) is an isomer of the sulfur-containing nucleotide derivative GTP-α-S.{69432} It binds to tubulin and induces microtubule assembly in cell-free assays when used at a concentration of 20 mM.