On the surface of Bsp it is necessary to place the molecules of nitrogen-containing
<p>heterocycles and deoxyribose in 12 ways. Given the 4 type of heterocycles, there
remains the 3 variant of placing deoxyribose on Bsp with one type of heterocycle.
If we number some characteristic points that have at least some differences in their
filling, etc., then you can get a variant of the full set of 12 letters. Such a Bsp is the
</p>
Burtykon or the letter of the genetic language.
<a href="//commons.wikimedia.org/wiki/User:Mihail_Burtyka" title="User:Mihail Burtyka">Mihail Burtyka</a>
<span class="int-own-work" lang="en">Own work</span>