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The anatomy of the median ocellus of Limulus (1971)

Jones, C. ; Nolte, J. ; Brown, J. E.

Springer

Cell & tissue research 118 (1971), S. 297-309

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ISSN: 1432-0878

Keywords: Median ocellus ; Limulus ; Fine structure

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Summary The median ocellus of Limulus consists of irregular groups of large photoreceptor cells which form a cup-shaped retina around the ocellar lens. Each group is surrounded and penetrated by guanophores and glia. The photoreceptor cells have extensive rhabdomeric regions, both along infoldings of cell membranes and between cells. Five-layered junctions occur between rhabdomeric microvilli. An occasional arhabdomeric (AR) cell is associated with a group of photoreceptors. Fine dendritic branches of the AR cell penetrate the rhabdomeric regions and form five-layered junctions with photoreceptor rhabdomeres. Axons of photoreceptor cells, and of at least some AR cells, gather at the proximal side of the cup to form an optic nerve.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00331188

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Cell surface glycoproteins I: Accumulation of a glycoprotein on the outer surface of mouse LS cells during mitosis (1972)

Brown, J. C.

New York, N.Y. : Wiley-Blackwell

Journal of Supramolecular Structure 1 (1972), S. 1-7

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ISSN: 0091-7419

Keywords: Life Sciences ; Molecular Cell Biology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Chemistry and Pharmacology , Medicine

Notes: Surface glycopeptides derived from vertebrate cells have been separated into 4 classes by chromatography on DEAE cellulose columns. Among different cell types tested, significant differences were observed in the relative amounts of these 4 glycopeptide classes present on the cell surface. This type of heterogeneity is consistent with the expected biological role of cell surface glycoproteins. One glycopeptide, as revealed by the DEAE column analysis, was found to have a characteristic metabolic pattern in mouse LS cells. New accumulation of this structure, called glycopeptide 4, on the cell surface was detected only around the period of cell division (M phase) and not at other times during the cell cycle.

Additional Material: 2 Ill.