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[Calorimetric study of bacteriophage T4 ghosts].

Heat-induced structural transitions of bacteriophage T4 ghosts have been studied using differential scanning microcalorimetry and electron microscopy. The tail reorganization process is not an exothermic one. It is shown to correlate well with a heat absorption peak at maximum of 70 degrees C, but the sheath contraction and the hexagon -to-star base-plate transition themselves appear to proceed without any significant changes in enthalpy.