Gustafson, Eric A Polycomb group gene expression in the sea urchin. [electronic resource] - Developmental dynamics : an official publication of the American Association of Anatomists Jul 2008 - 1851-61 p. digital Publication Type: Journal Article ISSN: 1058-8388 Standard No.: 10.1002/dvdy.21582 doi Subjects--Topical Terms: AnimalsEmbryo, Nonmammalian--embryologyGene Expression Regulation, DevelopmentalIn Situ HybridizationPolycomb-Group ProteinsRepressor Proteins--geneticsReverse Transcriptase Polymerase Chain ReactionSea Urchins--embryology