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Lohka CA and Yoshio Masui CA found that a cell-free preparation of the cytoplasm from activated eggs of Rana pipiens induces, in demembranated sperm nuclei of Xenopus laevisformation of a nuclear envelope, dispersion of chromatin, initiation of DNA synthesis, and chromosome condensation They found that the exonuclease proceeds with an inversion of configuration at the phosphorus atom, most probably via a direct displacement by water of the 3' terminus of the DNA chain to yield a 5'-nucleotide Major spinal injuries are classified into four different categories: Craig USSteven J.
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