confers_resistance_to_drug_class carbapenem confers_resistance_to_drug_class penicillin beta-lactam OXA beta-lactamase OXA-213-like beta-lactamase ARO:3007706 antibiotic_resistance OXA-213-like enzymes have been identified to be intrinsic to A. calcoaceticus and have been subsequently detected in A. pittii. Phylogenetic analysis of OXA-213-like proteins identified two distinct subgroups within the OXA family. The first group was linked to A. pittii and the second group to A. calcoaceticus. The carbapenemase activity of these OXAs may be related to the species-dependent effect.