Diagnostic and therapeutic applications for Noonan Syndrome are described. Thediagnostic and therapeutic applications are based on certain mutations in theprotein tyrosine phosphatase gene PTPN11 and its expression product, PTPN11.Also described are nucleotide sequences, amino acid sequences, probes, andprimers related to PTPN11 and PTP11 variants, and cells expressing suchvariants.
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