GTPase activating proteins (GAPs) stimulate the GTP-hydrolyzing activity of GTPases, such as p21[ ras]. Ras-GAP (120kDa) is perhaps the best characterized GAP. p190 is a Ras-GAP associated protein that is tyrosine phosphorylated in transformed and growth factor-stimulated cells. Ras-GAP and p190 are targets of oncoproteins and growth factor receptors. Recombinant p190 enhances GTPase activity of the rho family of GTPases. The complete sequence of p190 exhibits three major regions: an N-terminal region with homology to all GTPases, a middle region homologous to transcriptional repressors, and a C-terminal region the is similar to n-chimerin and other small GTPases.
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注意事项:
1.Since applications vary, each investigator should titrate the reagent to obtain optimal results.
2.Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing. .