Developmental Biology publishes original research on mechanisms of development, differentiation, and growth in animals and plants at the molecular, cellular,and genetic levels. Areas of particular emphasis include transcriptional control mechanisms, embryonic patterning, cellñcell interactions, growth factors and signaltransduction, and regulatory hierarchies. Research Areas Include: Molecular genetics of development; Control of gene expression; Cell interactions and cell-matrix interactions; Mechanisms of differentiation; Growth factors and oncogenes; Regulation of stem cell populations; Gametogenesis and fertilization; Developmental endocrinology; Plant development.