Figure 1

Structure of zebrafish β2.1 and β2.2 MAGUK genes. Exons are shown as black boxes; introns are not drawn to scale. Alternative splicing is indicated in the N-terminus and HOOK domain-encoding regions. * indicates the site of a premature stop codon in β2.1 transcripts that include exon 7. Labeled arrows indicate the locations and names of primers used in RACE and RT-PCR. Human exon structure was adapted from [57]. See Additional File 2A for primer sequences.