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To construct a polymerase chain reaction (PCR) site-directed mutagenesis of the long QT syndrome KCNQ1 gene in vitro, two sets of primers were designed according to the sequence of KCNQ1 cDNA and a mismatch was introduced into primers. Mutagenesis was performed in a two-step PCR. The amplified fragments from the third PCR which contained the mutation site were sub-cloned into the T-vector pCR2.1....
Long QT syndrome (LQTS) is the prototype of the cardiac ion channelopathies, which cause syncope and sudden death. Inherited LQTS is represented by the autosomal dominant Romano-ward syndrome (RWS), which is not accompanied by congenital deafness, and the autosomal recessive Jervell and Lange-Nielsen syndrome (JLNS), which is accompanied by congenital deafness. The LQTS-causing mutations have been...
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