This product is a soluable recombinant expressed RNase inhibitor which can specifically bind to RNase to form a complex by non-covalent bond, thus inactivating RNases. It does not inhibit the activity of RNase H, S1 nuclease, SP6, T7 or T3 RNA polymerase, AMV or M-MLV reverse transcriptase, Taq DNA polymerase, RNase T1 or other enzymes, and does not affect the subsequent reverse transcription and translation process. It is widely used in RNA research, such as RT-PCR, cDNA synthesis, mRNA protection, in vitro transcription, in vitro translation, in situ hybridization and mRNA localization.