RT Journal Article SR Electronic T1 A cystic fibrosis patient homozygous for the nonsense mutation R553X. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 715 OP 717 DO 10.1136/jmg.28.10.715 VO 28 IS 10 A1 J Bal A1 M Stuhrmann A1 M Schloesser A1 J Schmidtke A1 J Reiss YR 1991 UL http://jmg.bmj.com/content/28/10/715.abstract AB A cystic fibrosis patient homozygous for the nonsense mutation R553X was identified by mutation screening and the genotype confirmed by DNA sequencing. This patient, the only one described to date who is homozygous for this stop codon in exon 11 of the CFTR gene, is moderately severely affected. Clinical and molecular findings are presented.