Digitale Medien
Springer
Journal of molecular evolution
18 (1982), S. 405-413
ISSN:
1432-1432
Schlagwort(e):
Insect Vitellins
;
Immunological crossreactivity
;
Evolutionary model
;
Amino acid composition
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract Insects can be divided into three groups based on the sizes of the polypeptide constituents of their vitellogenins and vitellins. In order to determine the relationships between these groups, antisera to the vitellins of seven insects from six taxonomic orders were used to assess immunological cross-reactivity. Antigenic relatedness was observed only between vitellins from species within the same family. Amino acid compositional data for vitellins from nine species were used to assess homology by difference matrices. The SΔQ values were similar for both intra-order and inter-order comparisons and strongly suggested relatedness. The SΔn comparisons supported the immunological data that indicated that the vitellins were evolving rapidly. For most insect vitellins there are two distinct size classes of polypeptides that seem to be derived from a single asymmetric proteolytic cleavage of a precursor. We propose a model that suggests that the different size polypeptides represent distinct domains and that in the evolution of the vitellogenin genes of the Diptera and Hymenoptera there has been domain elimination.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01840888
Permalink
| Bibliothek |
Standort |
Signatur |
Band/Heft/Jahr |
Verfügbarkeit |
