Ribonuclease H2 subunit B (Rnaseh2b)

Non catalytic subunit of RNase H2, an endonuclease that specifically degrades the RNA of RNA:DNA hybrids. Participates in DNA replication, possibly by mediating the removal of lagging- strand Okazaki fragment RNA primers during DNA replication.

Mediates the excision of single ribonucleotides from DNA:RNA duplexes. .