作者: Elaine R. Levy , Sharon W. Horsley , Anthony P. Monaco , Elisabeth Steichen-Gersdorf , Vladimir Zajac
DOI: 10.1007/BF03405879
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摘要: An X;17 translocation breakpoint was characterised in a 5-year-old female with hypomelanosis of Ito (HI) who exhibits characteristic hypopigmented lesions, psychomotor retardation, and choroid plexus papilloma. A YAC clone containing the locus DXS1 from Xq12 found by fluorescence situ hybridisation to cross breakpoint. Cosmid clones positive for were used identify junction fragment patient’s DNA. chromosome- 17-specific DNA isolated cosmid crossing chromosome 17p13. Exon trapping identified two known genes 17: FMR1L2 (the fragile X mental retardation syndrome like protein 2) SHBG (human sex hormone-binding globulin). Mapping showed that neither gene disrupted translocation.