DNA-Flip is a webpage for quickly obtaining the reverse, complement, or reverse complement of a DNA or RNA sequence.
Sequence input may either be in the FASTA format or be plain sequence. Digits and whitespace are ignored and removed. Degenerate base symbols are supported per Cornish-Bowden (1985).
| Symbol | Description | Represented Bases | Complement | ||||
|---|---|---|---|---|---|---|---|
| A | Adenine | A | 1 | T | |||
| C | Cytosine | C | G | ||||
| G | Guanine | G | C | ||||
| T | Thymine | T | A | ||||
| U | Uracil | U | A | ||||
| R | puRine | A | G | 2 | Y | ||
| Y | pYrimidine | C | T | R | |||
| M | aMino | A | C | K | |||
| K | Ketone | G | T | M | |||
| W | Weak (2 hydrogen bonds) | A | T | W | |||
| S | Strong (3 hydrogen bonds) | C | G | S | |||
| B | not A | C | G | T | 3 | V | |
| D | not C | A | G | T | H | ||
| H | not G | A | C | T | D | ||
| V | not T | A | C | G | B | ||
| N | aNy | A | C | G | T | 4 | N |