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Lipid fraction of thyroid tissue in vivarium (V) and hypergravity (2 g) mice. a) amount of specific sphingomyelin (SM), phosphatidylcholine (PC) and ceraminde species; b) cholesterol (CHO) content; c) comparison of areas of different SM species; d) ratio of saturated/unsaturated SM species. The experiment was performed in left lobes of thyroid glands. Data represent the mean ± S.D. of 4 2 g mice and 3 V mice. Significance, *P<0.001 2 g versus V
