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:
Proteinstructurar.svg form english public domain org Proteinprimarystructure National Human Genome Research Institute Public domain see below en Image Proteinprimarystructure Protein primary structure svg English version Protein primary structure zh svg Chinese version PDUSGov Primary protein structure