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.
PDB bf EBI. All alpha proteins alphaalpha superhelix ENTH or VHS domain RPR domain SMART PCF protein EBI bf November PCF protein Files uploaded by Nichalp's script
Page 2023 Free-images.com. All images are Public Domain