A study was made of the effect of X-radiation on nuclear membranes. Good resolution spectra of nuclear membrane of equal effective thickness were obtained by the method of internal reflection spectroscopy in the infrared region. The experiment indicated the presence of major characteristic bands of protein and phospholipid molecular groups of non-irradiated nuclear membranes. Conformational changes in the samples of the exposed (100 and 1000 Gy) lipoprotein complex resulted in some quantitative changes in the absorption intensities of the molecular groups of membranes. These data are consistent with the behaviour of nuclear membranes on the interphase, studied by the Langmur monolayer technique, and with the changes in the membrane morphology observed with the electron microscope.
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