You can go to the introduction page from the head (DNA-RNA-Protein)

The document is divided into one basic and one advanced level. You can always reach the advanced level from the basic documents by pressing the advanced button in the header and vice versa.

Each of the five different chapters are represented by colors. You can reach the chapters from the head of the page.

The sitemap will open in a new window. You can navigate inside the sitemap and let the head-window present your selections.

These icons are used in the document:

	animation
	electron micrograph
	3D representation
	related Nobel prizes
	link to a corresponding page in the advanced level

To be able to see the animations you have to download the shockwave/flash plugin.