Working with sequences

Throughout this tutorial, we're going to look at members of the rhodopsin family of G-protein coupled receptors. The general principles are, of course, applicable to any sequences you would like to analyse. We will be working with sequences retrieved from tembl and SwissProt but you can also use EMBOSS with sequences in text files.

We will begin with two tembl sequences whose identifiers are XL23808 and XLRHODOP; these sequences are the genomic and the corresponding cDNA sequence for Xenopus laevis rhodopsin.

You need to tell EMBOSS where to read the sequence(s) you want to analyse. EMBOSS can read sequences either from text files or directly from a sequence database. The easiest way to see this is with examples.