The first step of the prediction pipeline is to specify the protein sequence(s) for which predictions should be performed. You have four options to input sequences: retrieve sequences from the Swiss-Prot or RefSeq database, upload a file in Fasta format, or paste your own sequences. If you retrieve polymorphisms for the RefSeq database, a heterocygosity restriction is available. Click on Help for details. Click on the submit button on the bottom of this page to display all requested or pasted sequences.