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The cell surface
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Acad acid active adhesion adult aggregates amphibian animal antibody antigen archenteron axons binding Biol blastocoel blastomeres blastopore blastula cDNA cell membrane cell surface cell types cellular chromatin chromosome cleavage cloned collagen containing cultured cytoplasm developmental differentiation disc dorsal Drosophila ectoderm embryo endoderm enzyme epithelial epithelium eukaryotic factor female fertilization Figure formation frog gastrulation gene expression genetic genome germ cells gland globin globin genes H-Y antigen hormone hybridization induced interactions intron isolated larva layer lens limb lymphocyte male mammalian mesenchymal cells mesoderm messages messenger RNA migration molecules mouse mRNA mutation Natl neural crest neural tube neurons normal nRNA nuclear nucleosomes nucleus oocyte organism ovalbumin posterior precursors Proc produce protein synthesis radioactive receptor region regulation ribosomal RNA RNA polymerase salivary sea urchin seen segment sequences specific sperm stage structures tadpoles tion tissue transcribed transcription translation ventral vesicle wild-type X chromosome Xenopus yolk