Alternative 5′ splice junctions predicted for exon 2 and exon 3 of CATHL8 and CATHL3L2 . Genomic DNA corresponding to exon 2 and exon 3 of CATHL 1-7, CATHL8, CATHL3L2 and CATHL9 was retrieved from the University of California, Santa Cruz genome browser (http://genome.ucsc.edu). These sequences were aligned using ClustalW, in MEGA5.2 . A) Exon 2 alignment with donor sites (splice junctions) highlighted in grey. B) Exon 3 alignment with donor sites highlighted in grey. Conserved nucleotides are indicated by an asterisk.