McNeil P L
Tissue Cell. 1984;16(4):519-33. doi: 10.1016/0040-8166(84)90028-4.
Freeze-fracture was used to compare the ultrastructure of plasma with phagosomal membranes of digestive cells of green hydra. Changes in both the pattern and density of intramembrane particles (IMP) were evident during the transition from plasma to phagosomal membrane. Small particle-free regions and associated aggregates of three to eight IMP were observed in presumptive adherent and enveloping plasma membranes, as well as in fully formed phagosomal membranes. Larger particle-free regions were observed as rims around the tips of enveloping membranes which had nearly completed enclosure of particles. The density of IMP in newly formed phagosomal membranes was 1.5-fold greater than that in the parent plasma membrane from which they derived, and was greater also than in older phagosomal membranes.
采用冷冻断裂技术比较了绿水螅消化细胞的质膜与吞噬体膜的超微结构。在从质膜向吞噬体膜转变的过程中，膜内颗粒（IMP）的模式和密度都发生了明显变化。在假定的粘附质膜和包被质膜以及完全形成的吞噬体膜中，观察到了小的无颗粒区域以及三到八个IMP的相关聚集体。在几乎完成颗粒包被的包被膜尖端周围观察到较大的无颗粒区域，呈边缘状。新形成的吞噬体膜中IMP的密度比其来源的母质膜高1.5倍，也比旧的吞噬体膜中的密度高。
