Structure, Evolution and Developmental Expression of the Silkmoth Chorion Multigene Families |
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| Authors: | KAFATOS FOTIS C |
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| Institution: | Department of Cellular and Developmental Biology, The Biological Laboratories, Harvard University Cambridge, Massachusetts 02138 and Department of Biology, Panepistimiopolis, University of Athens Athens, Greece |
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| Abstract: | SYNOPSIS. The silkmoth eggshell (chorion) is a complex extracellularstructure, with important physiological functions concerningsurvival of the developing embryo. The chorion proteins areencoded in several families of genes, generated during evolutionby gene duplication and diversification. The gene families arehighly regulated during development, so that more than 100 distinctchorion proteins are produced during specific stages in choriogenesis.Chorion genes are clustered in a single chromosome, and in theaggregate account for more than 350 kb of DNA. They have beencloned and their structure and organization have been studiedby recombinant DNA techniques. I summarize the information currentlyavailable, and relate it to the processes of gene evolutionand regulation of gene expression during development. |
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