SeqEd is an interactive editor for entering and modifying sequences and for assembling parts of existing sequences into new genetic constructs. You can enter sequences from the keyboard or from a digitizer.
SeqED
      AGTCTTAGTCGATCGTAcTGCATRCGA
....|:.......:|.........i.......:.|.........|.........|.........|.........|..
      0        10        20        30        40        50        60       70   
"sample.seq"   27 nucleotides
<ctr>d
<return>
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command mode