The molecular mechanism underlying milk fat globule secretion in mammary epithelial cells ostensibly involves the formation of complexes between plasma membrane butyrophilin and cytosolic xanthine oxidoreductase. These complexes bind adipophilin in the phospholipid monolayer of milk secretory granules, the precursors of milk fat globules, enveloping the nascent fat globules in a layer of plasma...

Myofibrils from pig muscle inoculated and incubated with Pseudomonas fragi showed an extremely disrupted appearance as compared to uninoculated controls. There was an almost complete absence of material in the H zone, marked disruption of the A band (probably myosin), and some loss of dense material from the Z line. These changes indicated that marked proteolysis had occurred. Bacteria observed...

We demonstrate an unusually intensive accumulation of prion protein (PrP) on neuronal membranes in hamsters infected with the Echigo-1 panencephalopathic strain of Creutzfeldt-Jakob disease. This stands in strong contrast with the poor vacuolation in this model. Several distinct patterns of PrP(TSE) deposit were observed in the brain. The first type consisted of a fine granular "synaptic"/diffu...

A 3-year-old girl was admitted with a 1-month history of headache. Neurologic examination was normal. Cranial CT revealed a mass with huge calcification in the right lateral ventricle (figure 1A). MRI demonstrated a lesion with low and high signal intensity and heterogeneous enhancement (figure 1, B–D). A right frontal craniotomy was performed. The right ventricle was found to be filled with se...

Chains of vesicles are prominent near the plasma membranes of both the neurons and satellite cells of osmium-fixed toad spinal ganglia. In permanganate-fixed specimens, however, such vesicles are absent, and in their place are continuous invaginations of the plasma membranes of these cells. The discrepancy suggests that the serried vesicles seen in osmium-fixed preparations arise through disint...

Spectral, angular, and temporal distributions of fluorescence as well as specular reflection were investigated for silica-based artificial opals. Periodic arrangement of nanosized silica globules in the opal causes a specific dip in the defect-related fluorescence spectra and a peak in the reflectance spectrum. The spectral position of the dip coincides with the photonic stop band. The latter i...

Study of living frog oocytes with the phase microscope has shown that the early yolk appears in two forms. One of these, the protein yolk, consists of thin, dense, plate-like bodies which in face view are almost always regular hexagons. The other form, the fatty yolk, occurs as clusters of globules of varying sizes. The plate-like bodies occur both singly and in clusters. As the oocytes mature ...