Apex 5X all-in-one cDNA synthesis supermix is a convenient, ready-to-use formulation of all the reagents necessary for first-strand cDNA synthesis with the exception of the template. This optimized, 5X concentrated reaction master mix contains proprietary Reverse Transcriptase, Ribonuclease Inhibitor, dNTPs and a finely balanced ratio of Oligo(dT)s and random primers.