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:
Computer cytochrome C. This image depicts cytochrome which is small protein used in the electron transfer chain Computer graphics are made by utilizing data fed into computer This data may consist of chemical weights and measures and the structure of specific elements threedimensional image can be made so one can visualize on otherwise