epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelial cell proliferation cell communication regulation of molecular function cellular response to stimulus response to external stimulus establishment of localization regulation of biological quality system process developmental growth nitrogen compound metabolic process biosynthetic process cellular metabolic process primary metabolic process organic substance metabolic process epithelialepithelial cell proliferation cell commucell communication regulationregulation of molecular function cellular rcellular response to stimulus response tresponse to external stimulus establishmestablishment of localization regulationregulation of biological quality system prosystem process developmendevelopmental growth nitrogen cnitrogen compound metabolic process biosynthetbiosynthetic process cellular mcellular metabolic process primary meprimary metabolic process organic suorganic substance metabolic process protein binding receptor regulator activity protein binding receptor regulator activity protein binding receptor regulator activity protein binding receptor regulator activity protein binding receptor regulator activity protein binding receptor regulator activity protein binding receptor regulator activity protein binding receptor regulator activity protein binding receptor regulator activity protein binding receptor regulator activity protein bindingprotein binding receptor regulator activityreceptor regulator activity extracellular region extracellular region extracellular 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