The OneTaq One-Step RT-PCR Kit offers sensitive and robust end-point detection of RNA templates. cDNA synthesis and PCR amplification steps are performed in a single reaction using gene-specific primers, resulting in a streamlined RT-PCR protocol. The kit combines three optimized mixes: OneTaq One-Step Enzyme Mix, OneTaq One-Step Reaction Mix and OneTaq One-Step Quick-Load Reaction Mix. The Enzyme Mix combines ProtoScript II Reverse Transcriptase, Murine RNase Inhibitor and OneTaq Hot Start DNA Polymerase. ProtoScript II Reverse Transcriptase is a mutant M-MuLV reverse transcriptase with reduced RNase H activity and increased thermostability. OneTaq Hot Start DNA Polymerase is mixture of a Hot Start Taq DNA Polymerase combined with a proof-reading DNA polymerase, resulting in high-yield amplification with minimal optimization. The OneTaq One-Step RT-PCR Kit is capable of amplifying long transcripts up to 9 kb in length.