Abstract
Summary
Esterase patterns characteristic for duodenum, liver, and pancreas in different stages of avian embryo development were studied with polyacrylamide disc gel electrophoresis. Embryonic and adult rat tissues were studied for comparison. It was found that the electrophoretic patterns of chicken liver and duodenum were similar for all developmental stages studied. In contrast, definite changes in pancreatic tissues were observed during development. It is postulated that the three main esterase bands observed in chicken tissues represent isoenzyme forms of β-type nonspecific esterases. The developmental changes and the identity of some bands present in rat tissue zymograms are discussed.
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