This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
PDB ddt EBI. All beta proteins Common fold of diphtheria toxin or transcription factors or cytochrome Diphtheria toxin Cterminal domain Diphtheria toxin Cterminal domain Diphtheria toxin Cterminal domain Diphtheria toxin Cterminal domain Membrane and cell surface proteins and peptides Toxins membrane translocation domains Diphtheria