ELECTRONIC	h   t   t   p   c o l o n   s l a s h   s l a s h   w   w   w dot b   b   c dot c o dot u   k   s l a s h   d n a   s l a s h   h   t w o   g   t w o   s l a s h	http://www.bbc.co.uk/dna/h2g2/	1