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  • 1
    Electronic Resource
    Electronic Resource
    Comparative aspects of structure and action of molluscan neuropeptides (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 448-456 
    Details
    ISSN: 1420-9071
    Keywords: Neuropeptide ; Mollusca ; ABRM ; Mytilus ; Achatina ; Helix ; d-amino acid residue
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A number of neuropeptides were isolated from the ganglia and muscles of molluscs, and their actions were examined. Diverse neuropeptides, in addition to several classical neurotransmitters, were suggested to be involved in the regulation of the anterior byssus retractor muscle ofMytilus. A wide structural variety of members of theMytilus inhibitory peptide family was observed in each of the generaMytilus, Achatina andHelix. Gly-Trp-NH2, the C-terminal dipeptide fragment of the neuropeptide AGPWamide, showed a more potent action than the parent peptide in all of the muscles examined. Peptides related to some molluscan neuropeptides were found to be distributed interphyletically. Some neuropeptides containing ad-amino acid residue were found inAchatina andMytilus. These aspects of molluscan neuropeptides are thought not to be exceptional.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01928163
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Action and immunoreactivity of neuropeptides in the buccal neuromuscular system of a prosobranch mollusc, Rapana thomasiana (1991)
    Springer
    Cell & tissue research 264 (1991), S. 57-62 
    Details
    ISSN: 1432-0878
    Keywords: FMRFamide ; Catch-relaxing peptide (CARP) ; Radula muscle ; Immunohistochemistry ; Rapana thomasiana (Mollusca)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In a prosobranch mollusc, Rapana thomasiana, the catch-relaxing peptide H-Ala-Met-Pro-Met-Leu-Arg-Leu-NH2 (CARP) was found to depress the contraction of the radula protractor and retractor elicited by electrical stimulations. The action of CARP was in contrast to that of other neuropeptides, H-Phe-Met-Arg-Phe-NH2 (FMRFamide) and H-Phe-Leu-Arg-Phe-NH2 (FLRFamide), which enhanced the contraction of the radula protractor and retractor, respectively. By immunohistochemical examinations, FMRFamide-like immunoreactive neurons were found on the rostral side of the right buccal ganglion and the caudal side of the left ganglion, where some CARP-like immunoreactive neurons were also distributed, indicating a possible coexistence of FMRFamide and CARP. FMRFamide- and CARP-like immunoreactivities were also detected in the neuropile of buccal ganglia, radula nerves arising from the ganglia, and nerve fibers in the radula muscles. The present results suggest that FMRFamide- and CARP-like peptides are involved in the regulation of the contraction of the radula muscles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00305722
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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