Keywords: Crystal structure of modified Gramicidin S horizontally.png pl Struktura krystaliczna modyfikowanej Gramicydyny S - poziomo 2011-09-27 http //commons wikimedia org/wiki/File Crystal_structure_of_modified_Gramicidin_S png en Jeremiah cc-zero Uploaded with UploadWizard Gramicidin S Antibiotics Ionophores X-ray structures |