Plasmid MapOpen a sequence and get to work
Open GenBank, FASTA, SnapGene .dna or AB1 files from your computer. A project can hold up to 20 sequences, with a limit of 250,000 bases per sequence and 5 MB per imported file. Multi-record FASTA files appear as separate sequences in the selector. The example is the public pUC19 record M77789.2, retrieved from NCBI, so you can explore a real annotated plasmid before opening your own work.
The workspace connects a circular map, linear map and sequence view. Select bases, inspect an annotation, search the sequence, or use the editing controls to insert, delete and reverse-complement DNA. Feature and primer annotations can be added or edited. Undo and redo operate within the active editing session. On smaller screens, use the map tabs to switch views; a desktop provides more room for simultaneous map and sequence work.
Keep both the edited project and the original
Save project downloads a .pmap file containing the editable sequences, annotations and exact bytes of imported originals. The workspace also saves the current project in this browser when storage is available. This is device-local recovery, not a cloud backup; download a project before moving computers or clearing browser data.
GenBank export is a conversion. It preserves the supported sequence and annotations, but it does not promise to represent every field in a different file format. FASTA contains sequence text without feature annotations. Original-file export returns the imported file unchanged and does not include edits. Editing and re-exporting the complete SnapGene .dna format is not available in this release.
An editor with explicit methods
The editor includes restriction-site inspection, a digest view, ORF display and a PCR product view using annotated primer positions. These are sequence models. They do not predict reaction yield or replace checking experimental conditions. Read formats and methods for the current behavior and limits. For codon lookups, printable genetic-code references and six-frame translation, use Codon Chart.
Portable projects are limited to 32 MB. New project downloads a copy of the current project before clearing the workspace.