Prepare your sequence(s) in the FASTA format that starts with a definition line, followed with a hard return and the sequence.
Sequence length must be 50 - 30,000 bases, vector-free, and <50% Ns, excluding terminal Ns which will be trimmed automatically.
The simplest definition line requires the “> “ symbol and a sequence_ID. Sequence_IDs should be less than 25 characters and unique within a submission.
Use only ASCII characters for your definition line and IUPAC codes for your sequences. Upload a FASTA file as a plain-text file (prepared with a text editor). The file may have one or more sequences.