Membrane targeting, ultrashort lipopeptide acts as an antibiotic adjuvant and sensitizes MDR gram negative pathogens toward narrow spectrum antibiotics ScienceDirect Frontiers Understanding the selectivity in silico of colistin and daptomycin toward gram negative and gram positive bacteria, respectively, from the interaction with membrane phospholipids BPC 157 trifluoroacetate salt 95% (HPLC) Sigma Aldrich The Comprehensive Antibiotic Resistance Database A host directed adjuvant sensitizes intracellular bacterial persisters to antibiotics Nature Microbiology