Nature Genet. 32, 300–305 (2002).

Published online 9 September 2002; corrected 3 October 2002 (details online); doi:10.1038/ng996

A sequence analysis error (deletion of two cytosine residues) occurred in the previously named exon –4. This masked a methionine codon located 176 amino acids upstream of the previously reported initiation codon. Correction of this error indicates that NPHP4 contains four additional coding exons, and the protein nephrocystin-4 is composed of 1,426 amino acids instead of 1,250. The exons should be renumbered as follows: exon –5 becomes exon 1, the initiation codon is in exon 2 and the last exon is exon 30. The designations of all the mutations have changed as shown in the following revised version of Table 1.