FASTA format
The FASTA sequence file format is widely supported by bioinformatics tools.
For a detailed description, see this Wikipedia entry about FASTA.
Like most programs, MUSCLE does not support comment lines in FASTA data.
The first character in a FASTA file must be a greater-than symbol (>),
immediately followed by the label of the first sequence.
Gaps in input sequences (dashes or dots, - and .) are discarded.
Gaps are inserted into alignments using dashes (-).
