Australian scientists have mapped the molecular structure of a protein that shields superbugs from antibiotics. The University of Western Australia researchers said, it could help develop new drugs for antibiotic-resistant bacteria strains. <br/>The protein, EptA, allows some strains to shrug off colistin, an antibiotic used when all other treatments fail. It follows warnings that a so-called antibiotic apocalypse could be among the 21st Century's greatest threats.According to lead researcher Professor Alice Vrielink, the new research could help create treatments to inhibit the masking protein.