Hipervinculos (imagenes de portada-cabecera)

I, Thomas Splettstoesse

Crystal structure of parallel quadruplexes from human telomeric DNA. The D

NA strand (blue) circles the bases that stack together in the center around three co-ordinated metal ions (green). Produced from NDB ID: UD0017

https://en.wikipedia.org/wiki/DNA#/media/File:Parallel_telomere_quadruple.png