You can keep clicking on blue text until you find what you want. You can go back to previous sites by clicking on the BACK button in the menu bar. This may be done multiple times to go back multiple steps. A dialog box for specifying the file name and location will appear. After filling this out, you can go on browsing other sites while the file is downloaded.
Many sites contain forms for entering information such as protein or nucleotide sequences.
If you have only sequence data, it must either be typed in the box or pasted in after loading the sequence in the Windows clipboard. This has not been updated for several years so that some links may no longer work. This is primarily a search engine for the European sites. This is particularly useful for information on protein domains. Use this to find nucleotide or protein sequences similar to your own.