although there was little basal release of inositol phosphates from membranes purified from labelled cells , in the presence of guanosine 5'- [ gamma-thio ] triphosphate ( gtp [ s ] ) the rate of accumulation of inositol bis- , tris- and tetrakis-phosphate ( insp2 , insp3 and insp4 ) was increased 20-50-fold .
C0021554
inositol phosphates
C0021549
insp3