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Abdominal-B expression in a spider suggests a general role for Abdominal-B in specifying the genital structure

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Zitation

Damen, W. G. M., & Tautz, D. (1999). Abdominal-B expression in a spider suggests a general role for Abdominal-B in specifying the genital structure. Journal of Experimental Zoology Part B-Molecular and Developmental Evolution, 285(1), 85-91. doi:10.1002/(SICI)1097-010X(19990415)285:1<85:AID-JEZ10>3.0.CO;2-N.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0010-0EA9-8
Zusammenfassung
We have cloned an Abdominal-B (Abd-B) orthologue from the spider Cupiennius salei and have analysed its expression pattern during embryogenesis. An early expression domain is seen in the posterior part of the embryo, with an initial border in the third opisthosomal segment and later in the fifth opisthosomal segment. During mid-stage of germ band extension, two additional spots of expression appear in the posterior parts of the limb buds on the second opisthosomal segment. These coincide with the position of the future genital opening and Cs-Abd-B remains expressed in these regions until the openings are formed. In view of the fact that Abd-B and its orthologous genes are also required for specifying the genitalia in Drosophila and vertebrates, we suggest that this function may constitute an independent and ancestral role of Abd-B that can be separated from its role in specifying the posterior part of the body region. (C) 1999 Wiley-Liss, Inc.