Sequence alignment of MALS-1, -2, and -3 with LIN-7. Sequences are shown in single letter amino acid code and are aligned for maximal homology with the C. elegans LIN-7 protein. Residues present in a majority of the sequences are shadedgray. Arrowheads designate the PDZ domains. (GenBank accession numbers for cDNAs encoding MALS-1, -2, and -3 are AA405216, W75523, and AA462021, respectively.)