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Analysis of the VNTR polymorphism in intron 4 of the eNOS gene. The band of 420 bp indicates five repeats and the band of 393 bp indicates four repeats of the 27 bp: lane 1, size marker; lane 2, wild type (4b/b); lane 3, four and five repeats heterozygote (4b/a); lane 4, four repeats homozygote (4a/a).
