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  • 1
    Electronic Resource
    Electronic Resource
    Changes in the acetylcholinesterase and choline acetyltransferase activities in the early development of the chick embryo (1985)
    Springer
    Development genes and evolution 194 (1985), S. 306-310 
    Details
    ISSN: 1432-041X
    Keywords: Chick embryo ; Gastrulation ; Acetylcholinesterase ; Molecular forms of acetylcholinesterase ; Choline acetyltransferase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Acetylcholinesterase (AChE, EC 3.1.1.7) and choline acetyltransferase (CAT, EC 2.3.1.6) activities where studied in the early development of the chick embryo. A sharp increase in AChE activity occurred in the gastrulating embryo. The highest AChE activity was associated with hypoblast cells. By sucrose density gradient centrifugation three molecular forms of AChE with sedimentation coefficients 4.7 S, 6.8 S and 10.9 S were determined. During the gastrulation there was no remarkable change in the activity of CAT. A two-fold decrease in the CAT activity occurred at the end of gastrulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01152177
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrastructural localization of adenylate cyclase and cAMP phosphodiesterase in the gastrulating chick embryo (1983)
    Springer
    Development genes and evolution 192 (1983), S. 42-44 
    Details
    ISSN: 1432-041X
    Keywords: Chick embryo ; Gastrulation ; Adenylate cyclase ; cAMP phosphodiesterase ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The ultrastructural localization of adenylate cyclase (E.C. 4.6.1.1.) and cAMP phosphodiesterase (PDE) (E.C. 3.1.4.17.) in the ectoderm of the developmental stage 4 chick embryo was studied. Adenylate cyclase was localized in the lateral surfaces of the ectodermal cells. In the primitive streak cells the enzymatic activity was observed on all the lateral surfaces, whereas in the periphery of the blastoderm the reaction product was localized in the apical parts of the lateral plasma membranes only. cAMP PDE localized in the apical cytoplasm of the ectodermal cells, with highest activity in the globular projections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00848768
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Exogeneous cyclic AMP blocks the muscarinic receptor-mediated intracellular Ca2+-release in the gastrulating chick embryo cells (1987)
    Springer
    Development genes and evolution 196 (1987), S. 464-466 
    Details
    ISSN: 1432-041X
    Keywords: Chick embryo ; Gastrulation ; Exogeneous cAMP ; Muscarinic receptor ; Cytosolic free Ca2+ ; Intra-cellular cGMP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Exogeneous cyclic AMP (cAMP, 10−8M), when added together with acetylcholine (ACh, 500 μM) to dissociated chick embryo cells, blocked the ACh-stimulated increase in the level of cytosolic free Ca2+ ([Ca2+]i). This inhibiting action of exogeneous cAMP is probably mediated by intracellular cyclic GMP (cGMP) and cAMP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00399147
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    Paper (German National Licenses)
    Fulltext
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