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Ocellar projections within the central nervous system of the worker honey bee, Apis mellifera (1977)

Pan, K. C. ; Goodman, L. J.

Springer

Cell & tissue research 176 (1977), S. 505-527

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ISSN: 1432-0878

Keywords: Honey bee ; Insect brain ; Ocellar system ; Cobalt stain

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Summary The projections of ocellar fibres within the brain and thorax of the honey bee, Apis mellifera, were established using a modified cobalt sulphide technique, supplemented by serial sectioning of the brain for the light microscope. The results are: 5 large fibres in each lateral nerve and 12 in the median nerve have wide-field terminal arborisations in ocellar association areas on either side of the posterior slope area. 9 medium-sized fibres in each lateral nerve and 12 in the median nerve form a second ocellar association area on each side of the perioesophageal foramen. A group of fine fibres, stained via the ocellar nerves, arborise just below and anterior to the protocerebral bridge. 10 medium-sized fibres run from the level of the ocellar nerve tracts to the first and second thoracic ganglia, branching in a number of discrete areas within each ganglion. These fibres also form a restricted ocellar association area within the suboesophageal ganglion. A few fibres run between the higher-order optic centres and the ocellar tract. The large- and mediumsized fibres give off short, stout spines from their axons within the ocellar tracts.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00231405

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Posttranslational modification of ras proteins: Detection of a modification prior to fatty acid acylation and cloning of a gene responsible for the modification (1988)

Tamanoi, F. ; Hsueh, E. C. ; Goodman, L. E. ; [et al.]

New York, N.Y. : Wiley-Blackwell

Journal of Cellular Biochemistry 36 (1988), S. 261-273

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ISSN: 0730-2312

Keywords: Schizosaccharomyces pombe ; Saccharomyces cerevisiae ; subcellular localization ; DPR1 gene ; processing of ras protein ; Life and Medical Sciences ; Cell & Developmental Biology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Chemistry and Pharmacology , Medicine

Notes: Products of ras genes are synthesized as precursors in the cytosol and transported to the plasma membrane by a process which involves posttranslational modification by fatty acid. In this paper, we present evidence for the occurrence in the cytosol of an intermediate modification of ras proteins prior to the fatty acid acylation. The modification is detected by a slight shift in the mobility of the protein on SDS polyacrylamide gel. The fatty acid acylation does not contribute to this mobility shift. This modification is affected by the dpr1 mutation which has recently been shown to affect the processing of yeast RAS proteins. To further characterize the nature of the modification event, we have cloned DPR1 gene from the DNA of Saccharomyces cerevisiae. The gene is actively transcribed in yeast cells producing mRNA of approximately 1.6 kb. Genes related to the DRP1 appear to be present in a distantly related yeast, Schizosaccharomyces pombe as well as in guinea pig and human cells.

Additional Material: 8 Ill.