Function
Toxic component of a type II toxin-antitoxin (TA) system (PubMed:25391136, PubMed:27672196). Acts as an RNase (Probable). Its toxic effect is neutralized by cognate antitoxin VapB1 (PubMed:25391136, PubMed:27672196) but not by non-cognate antitoxin VapB2 (PubMed:25391136, PubMed:27672196).