This image is in the public domain. It has been uploaded to the Commons as part of the Molecular and Cellular Biology WikiProject in collaboration with the public-domain database Rfam. Here is the link to the discussion.

本檔案處於公有領域，因為This image is taken from the Rfam database, which is completely in the public domain. 此模版不得用於描述某上傳者自己的作品發表至公有領域的情形；請改用CC0。 本作品必須清晰描述同時在美國及其來源國的自由可用性。