Exodeoxyribonuclease VII small subunit xseB Bidirectionally degrades single-stranded DNA into large acid-insoluble oligonucleotides, which are then degraded further into small acid-soluble oligonucleotides (By similarity). EX7S_SINMW Smed_0495 Exodeoxyribonuclease 7 small subunit 83 MNNTAQQDVSALSFEQAVEELERIVSALERGDVALDKSIEIYERGEALKKHCEALLKAAEDRIEKIRLDRAGRPQGVEPLDAE