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中文摘要：
猪胰铁蛋白（pig pancreas ferritin，PPF）铁核由179 phosphate／PPF和1698 Fe^3＋／PPF组成，平均磷铁比值为1：9．5．PFF铁核表层由较高的磷铁比组成．选用电子光谱技术研究PPF释放铁和磷酸盐全过程，发现PPF以两种不同速率途径释放铁与磷酸盐．在弱酸条件下，PPF释放铁的速率明显高于在弱碱条件下的速率，证实PPF蛋白壳的柔性调节能力强弱是控制释放铁和磷酸盐速率的重要因素之一．
英文摘要：
The iron core of pig pancreas ferritin （PPF） is composed of 179 phosphates and 1698 Fe^3＋ per molecular PPF. The ratio of phosphate to iron within the PFF core is determined to be 1：9.5. The ratio on the surface of the iron core in PPF is higher than that in the inside of the core. A complete process of iron and phosphate releasing from the PPF is observed using electron spectra technique. The resuits showed that both the iron and phosphate veleasing presented two different rates. In weak acid medium, the releasing rate of iron in PPF is much faster than that in weak basic medium.
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