The initial concentration or total yield of your synthesized probe is listed on the data sheet supplied with the probe. TaqMan probes are sometimes shipped in the lyophilized state, but more often are shipped in solution (1X TE). To create a working stock solution of your probe or primers, you should reconstitute or dilute the probe in the appropriate volume of sterile 1X TE (1 mM Tris, 0.1 mM EDTA, pH 8.0) or sterile, nuclease-free H2O. Detailed instructions on how to calculate the proper volume of solution to add to your probe are provided in our online Tutorial document "Reconstituting and Diluting Primers and TaqMan Probes". You can find a copy on our website by entering this title in the main Search field.