
The D5220-1 by Zymo Research is Micrococcal Nuclease (MNase, E.C. 3.1.31.1) at 0.1 U/µl (10 U/100 µl), a Ca²⁺-dependent endo-exonuclease that cleaves ssDNA, dsDNA, ssRNA, and dsRNA with preference for AT/AU-rich regions, producing 3′-phosphate mono- and oligonucleotides. Inactivated by EDTA; used for ChIP chromatin digestion, MNase-seq, and nucleic acid removal from lysates.