RT Journal Article SR Electronic T1 Molecular analysis of contiguous exons of the phenylalanine hydroxylase gene: identification of a new PKU mutation. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 228 OP 231 DO 10.1136/jmg.30.3.228 VO 30 IS 3 A1 I Dianzani A1 C Camaschella A1 G Saglio A1 G B Ferrero A1 S Ramus A1 A Ponzone A1 R G Cotton YR 1993 UL http://jmg.bmj.com/content/30/3/228.abstract AB A modified application of the chemical cleavage of mismatch (CCM) method has been used to screen three contiguous exons (exons 9, 10, and 11) of the phenylalanine hydroxylase gene in 17 Italian PKU patients. A new nonsense heterozygous C-->G transversion within exon 11 (S359X) was identified in a single patient. Only one of the four mutations previously reported in this DNA region in Caucasians was found. This lesion, IVS X-546, was detected in five of the 34 PKU alleles examined. Our results underline the versatility of the CCM method for scanning a gene for multiple mutations.