This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) The topic of this article may not meet Wikipedia's general notability guideline. Please help to demonstrate the notability of the topic by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond a mere trivial mention. If notability cannot be shown, the article is likely to be merged, redirected, or deleted.Find sources: "Mir-550 microRNA precursor family" – news · newspapers · books · scholar · JSTOR (August 2012) (Learn how and when to remove this message) This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Mir-550 microRNA precursor family" – news · newspapers · books · scholar · JSTOR (September 2019) (Learn how and when to remove this message) (Learn how and when to remove this message)