ELECTRON-ENERGY-LOSS SPECTROSCOPY STUDY OF IRON DEPOSITION IN HUMAN ALVEOLAR MACROPHAGES - FERRITIN OR HEMOSIDERIN

被引:4
作者
DIOCIAIUTI, M
FALCHI, M
PAOLETTI, L
机构
来源
MICROSCOPY MICROANALYSIS MICROSTRUCTURES | 1995年 / 6卷 / 01期
关键词
D O I
10.1051/mmm:1995105
中图分类号
TH742 [显微镜];
学科分类号
摘要
Electron energy loss spectroscopy imaging (EELSI) was used to obtain Fe maps, with molecular resolution, in human alveolar macrophages. Fe concentrations were found in particular structures named siderosomes. The combined application of Extended energy loss fine structure (EXELFS) analysis, a ''short-range'' probe, and Selected area electron diffraction (SAED), a ''long-range'' probe, allowed us to investigate the atomic arrangement of proteins constituting the siderosomes. Results are compared with structural data obtained on purified proteins. It is found that the siderosomes seem to be constituted mainly by normal hemosiderins.
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页码:33 / 40
页数:8
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