#NEXUS
[simple_taxa_and_chars.nex]

BEGIN TAXA;
    dimensions ntax=4;
    taxlabels A B C D;  
END;
BEGIN CHARACTERS;
    dimensions nchar=6;
    format
        datatype=protein missing=? gap=- ;
    matrix
        A   -MQG-?
        B   ---G--
        C   -MGG--
        D   -MGTGQ
        ;
END;