Fig. 1From: X Chromosome Inactivation Patterns Correlate with Fetal-Placental Anatomy in Monozygotic Twin Pairs: Implications for Immune Relatedness and Concordance for Autoimmunity Schematic map of a portion of the first exon of the androgen receptor gene The polymorphic CAG triplet repeat is flanked by HpaII sites and the locations of the primers AR1 and AR2 used for the PCR assay are indicated.Back to article page