Output alignment formatFormat for generated multiple sequence alignment.STRINGclustal_numtruedescriptionClustal alignment format with base/residue numberingclustalfalsedescriptionClustal alignment format without base/residue numberingfafalsedescriptionPearson or FASTA sequence formatmsffalsedescriptionMultiple Sequence File (MSF) alignment formatnexusfalsedescriptionNEXUS alignment formatphylipfalsedescriptionPHYLIP interleaved alignment formatselexfalsedescriptionSELEX alignment formatstockholmfalsedescriptionSTOCKHOLM alignment formatviennafalsedescriptionVIENNA alignment format