Strains Achromobacter insuavis and Enterobacter cancerogenus, as well as their co-culture, were grown in LB medium with/without 100 mg/L Cd²⁺ for 48 h. For label‑free proteomics, cells were lysed in urea/thiourea/CHAPS buffer, homogenized, sonicated, and centrifuged. The protein precipitate was analyzed by LC-MS/MS (Agilent 1290‑TripleTOF 5600).