Jalview is a multiple alignment editor written in Java. It is used widely in a variety of web pages (e.g. the EBI Clustalw server and the Pfam protein domain database) and is also available as a general purpose alignment editor. o Reads and writes alignments in a variety of formats o Gaps can be inserted/deleted using the mouse. o Group editing (insertion deletion of gaps in groups of sequences). o Removal of gapped columns. o Align sequences using Web Services (Clustal, Muscle...) o Amino acid conservation analysis similar to that of AMAS. o Alignment sorting options (by name, tree order, percent identity, group). o UPGMA and NJ trees calculated and drawn based on percent identity distances. o Sequence clustering using principal component analysis. o Removal of redundant sequences. o Smith Waterman pairwise alignment of selected sequences. o Web based secondary structure prediction programs (JNet). o User predefined or custom colour schemes to colour alignments or groups. o Sequence feature retrieval and display on the alignment. o Print your alignment with colours and annotations. o Output alignments as HTML pages, images (PNG) or postscript (EPS).