Ribonuclease A (RNase A), molecular weight 13.7 kDa, is an endonuclease that specifically acts on the 3 end of the pyrimidine residue on RNA, cleaving phosphodiester bonds formed with adjacent nucleotides, and the final product of the reaction is pyrimidine 3 phosphate and an oligonucleotide with pyrimidine 3 phosphate at the end. RNase A does not work on DNA. This product is DNase and protease free, and it can be used without heat treatment before use. This product is provided in a solution form at a concentration of 10 mg/mL. The recommended working concentration is 1-100 μg/mL, which varies depending on specific applications.