The letters for nucleotide sequences are A, C, G , U, T and - to indicate gaps. The letters are always to be specified to the Inform program. The msf format is used as output from a number of multi sequence alignment programs. However, as 'msf' formats can vary for different programs, we feel that it is necessary to state what this program expects from the format.
First field is assumed to be a name, the rest is assumed to be sequences.