Representative SNP Analysis of Sfmbt2 Domain Genes. A. Twenty two genes flanking Sfmbt2 were analysed for allelic expression in placenta or yolk sac from C57BL6 (D) X Castaneus (C) mid gestation fetuses. Illustrated is a screen shot of the UCSC genome browser image of the region encomapssing Gata3 to Mrc1 on Chromosome 2. Prkcq is not expressed in extraembryonic tissues. B. Shown are three representative genes, Ankrd16, Itih5 and Fbxo18, analysed by allele-specific expression RFLP. The two parental alleles are clearly present in placenta cDNA for all three genes. Results for the other genes can be seen in Additional file 1, Figure S1.