Titlebook: Lymphocyte Stimulation; Differential Sensiti Amleto Castellani Book 1980 Springer Science+Business Media New York 1980 DNA.biology.cell.cel

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DNA Replication Units in Eukaryotes, up to the order of 1 m. Very simple calculations show that a DNA molecule of such astonishing size cannot replicate starting from a unique origin and proceeding at one or two (bidirectional) replication forks as it occurs in prokaryotic chromosomes and in the small DNA molecules of plasmids, viruse

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,Functions of DNA Polymerases α, β and γ in DNA Replication and Repair,ing the physical, chemical and catalytical properties of these enzymes has progressed considerably during the past few years so that the distinction of their activities is easily obtained by utilizing the differences in molecular weight, sensitivity to inhibitors, chromatographic elution, ability to

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Thymocyte Maturation Induced by a Cyclic AMP-Elevating Thymic Factor,hymus, as suggested by experiments in a diffusion chamber (1, 2). Several factors, acting on T-cell differentiation, have been found in thymic extracts, in peripheral blood and in supernatants of thymic epithelial cultures (for review, see ref. 3). Probably, these factors act via specific membrane r