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 bib EBI. All beta proteins SHlike barrel Cterminal domain of transcriptional repressors Biotin repressor BirA Biotin repressor or biotin holoenzyme synthetase Cterminal domain Biotin repressor or biotin holoenzyme synthetase Cterminal domain All alpha proteins DNA or RNAbinding helical bundle Winged helix DNAbinding domain Biotin