Additional file 1.

Trophoblast subtype-specific expression profiles of PRL family members compared with location within the PRL family locus. Blue boxes indicate positive expression of the corresponding gene within the designated trophoblast subtype population, although there is no indication of the proportion of cells within a given population that are positive. Grey boxes indicate no gene expression within a given trophoblast subtype. Genes labeled in red indicate those genes which are expressed in only one trophoblast subtype while black labels indicate genes expressed in multiple subtypes. Rectangles are used to indicate the location of genes within the locus on chromosome 13 while ovals are used to indicate the location of pseudogenes. *The Prl2c gene located within the main prolactin family cluster (27–28 Mb) does not correspond to any of the 4 Prl2c genes previously annotated from cDNA sequences (Prl2c2, c3, c4 and c5) and is therefore referred to as Plf, the original gene symbol. Summary of spatial expression data for each PRL/PL family member correlated with gene position within the PRL/PL locus.

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Simmons et al. BMC Genomics 2008 9:352   doi:10.1186/1471-2164-9-352