Early stage of the genetic code (GC-Code) with "Alanine World" and its possible alternatives.
<a href="//commons.wikimedia.org/wiki/User:CzarJobKhaya" title="User:CzarJobKhaya">CzarJobKhaya</a>
CC BY-SA 4.0
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Early_genetic_code.jpg" title="File:Early genetic code.jpg">Early genetic code.jpg</a>