Peptide sequence: SNWDAETLTE DQVIYAARDA QISVALFLHL LGYPFSRNSP GEKNDDHSSW Sequence homology: Human: 100%. Exonuclease that has both 3'-5' exoribonuclease and exodeoxyribonuclease activities, depending on the divalent metal cation used as cofactor (PubMed: