The ionic strength and the pH of GeneAmp 10X PCR Gold Buffer have been carefully optimized for use with the AmpliTaq Gold enzyme. GeneAmp 10X PCR Buffer I contains Mg; Geneamp 10X PCR Buffer II and Geneamp 10X PCR Gold Buffer do not have Mg in them, but come with a separate vial of 25 mM MgCl2 so that you can titrate the Mg in your PCR reaction.
Buffer formulations:
Buffer I (500 mM KCl, 100 mM Tris-HCl, pH 8.3, 15 mM MgCl2, 0.01% (w/v) gelatin)
Buffer II (500 mM KCl, 100 mM Tris-HCl, pH 8.3), with separate tube of 25 mM MgCl2
Gold Buffer (500 mM KCl, 150 mM Tris-HCl pH 8.0), with separate tube of 25 mM MgCl2
Find additional tips, troubleshooting help, and resources within our PCR and cDNA Synthesis Support Center.