Smooth septate junctions in the midgut of Musca domestica and in Malpighian tubules of both Musca and Rhodnius prolixus are described. Details of the structures revealed after standard fixation, fixation in the presence of the stain, lanthanum hydroxide, and after freeze-fracture are discussed in the light of models previously put forward to explain the interrelations of the images obtained by ...

Using modifications of techniques used for the isolation of macula type intercellular junctions (gap junctions and desmosomes) the arthropod smooth septate junction has been isolated from insect midgut tissue. Midguts from cockroaches or mealworms were used and membrane fractions were obtained by sucrose gradient and ultracentrifugation techniques. Preparations with reasonable concentrations of...

Mycorrhizal and dark septate endophyte in Chlorophytum borivillianum cultivated in different parts of southwest India was found. Dark septate fungi with melanized hyphae and microsclerotia were documented. During culturing of themicrosclerotia-containing roots, fungi with `Rhizoctonia-like’ characters developed. The fungi showed reluctance in sporulation but produced microsclerotia in the mediu...

Axonal insulation is of key importance for the proper propagation of action potentials. In Drosophila and other invertebrates, it has recently been demonstrated that septate junctions play an essential role in axonal insulation or blood-brain-barrier formation. Neurexin IV, a molecular component of Drosophila septate junctions, has been shown to be essential for axonal insulation in the PNS in ...

In This Issue In This Issue Conjunctions of junctions ike tight junctions in vertebrates, the ladder-like septate junctions found in most invertebrates act as barriers to epithelial permeability. A pair of papers L The ␣ subunit of a pump (the Na ϩ /K ϩ ATPase) is found at the barrier-forming septate junctions in flies. esides allowing ions to flow between adjacent cells, gap junctions selectiv...

A 5-year-old girl child was admitted with complaints of fever, nonbilious vomiting and anorexia. The child weighed 15.5 Kg and the height was 91 cm. On examination she had no dysmorphic features, moderate dehydration, pallor, icterus and a tender hepatomegaly of 3 cm. On investigation, the hemoglobin was 9.8 g/dl and total leukocyte count 14,500 cells/cu mm. Total bilirubin was 3.6 mg/dl with a...