here we show that the non-hydrolysable gtp analogues guanine-5- ( gamma-thio ) trisphosphate and guanylyl-5-imidodiphosphate , introduced into human t cells by means of a transient membrane permeabilization technique , can replace an external mitogenic ligand , such as concanavalin a , in inducing early ornithine decarboxylase activity .
C0018353
gtp
C0018366
guanylyl