570 analysis anatomy bacteria bacterialcellwalls bacterialphysiologicalphenomena bilayerlipidmembranes biological biologicalinterfaces biologicalmodels biologicaltransport biosynthesis bodyfluids cell-freesystem cellcommunication cellfractionation cellinteraction celljunctions cellmembrane cellmembranepermeability cellorganelles cellreceptors cells cellularcontrolmechanisms cellularsignaltransduction cellwall chemistry congresses control cytology developmentalcytology embryology enzymes enzymology fertilization(biology) freeze-etching freezeetching glycoproteins histology insecticides insectpests insects intercellularjunctions intracellularmembranes lifesciences lipids liposomes membranelipids membranepotentials membraneproteins membranes membranes(biology) metabolism methods microbiology microscopy models morphology nanoscience nervetissue nervoussystem ovum permeability physiologicaleffect physiology plasmodesmen prokaryotes proteins protons qh509p9671988 qh601a2851975 qh601c748c1986 qh601i106c1976 qh601s677c1979 qm575 qu105f499w1987 qu350 qu55h894m1976 qu58r846p1985 qw52b1311973 science secretion subcellularfractions ultrastructure vertebrates vertebratesnervoussystemtissuesanatomyresearchfreeze-etching water we2200 we5340 wl101s219m1977 zellkontakt