ESTERASE ISOZYMES AND THEIR PROBABLE GENETIC LOCI IN TWO COLOUR MORPHS OF THE FRESHWATER EEL, ANGUILLA ANGUILLA, FOUND IN EGYPT | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 6, Volume 3, Issue 3, June 1999, Page 63-79 | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.1999.3428 | ||||
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| Authors | ||||
| Mohamed B. Abdelmordy Abdelmordy1; Tarek Tantawi2 | ||||
| 1Zoology Department, Faculty of Science, Ain Shams University, Cairo, Egypt | ||||
| 2Genetics Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt | ||||
| Abstract | ||||
| Esterases from different body organs of two colour morphs of the freshwater eel, Anguilla anguilla were extracted and analyzed using starch gel electrophoresis, five substrates and four inhibitors. Eight esterase bands were recognized in both colour morphs. Bands were distributed in two main zones. They exhibited different tissue distribution, and different substrate specificity. As the results of inhibition studies, esterases were classified as carboxylesterases and acetylesterases. Depending on substrate specificity, inhibition characteristics and relative mobility, esterase bands could be traced to three genetic loci. One locus codes for bands of zone I. The other two loci code for bands of zone II. No significant differences could be found between the two colour morphs. | ||||
| Keywords | ||||
| esterase isozymes; Fishes; Electrophoresis; Polymorphism; genetic loci | ||||
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