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 rnl EBI. All alpha proteins DNA or RNAbinding helical bundle Cterminal effector domain of the bipartite response regulators GerElike LuxR or UhpA family of transcriptional regulators Nitrate or nitrite response regulator NarL EBI rnl November Nitrate or nitrite response regulator NarL Files uploaded by Nichalp's script