On the latency of blood phenoloxidase of painted locust Poeciloceros pictus.
The blood phenoloxidase of Poeciloceros pictus exists as proenzyme. The amidase activity present in the haemocyte is responsible for the activation of haemocyte phenoloxidase. There is an amidase inhibitor in the plasma. Plasma phenoloxidase could be activated by various fatty acids, biological compounds like lipopolysaccharide zymosan and detergents. Electrophoretic studies suggest that activation of haemocyte phenoloxidase involves limited proteolysis. It is suggested that the natural activator of plasma phenoloxidase may be fatty acid and it does not undergo proteolysis during activation. The biological compounds like zymosan or LPS are easily recognised by the factor(s) from the membranes of haemocytes.
Nellaiappan
K
K
Department of Zoology, University of Madras, India.
D000581:Amidohydrolases / Q000097:blood; D000818:Animals; D004586:Electrophoresis; D004789:Enzyme Activation / Q000187:drug effects; D004792:Enzyme Precursors / Q000097:blood; D005227:Fatty Acids / Q000494:pharmacology; D006110:Grasshoppers / Q000201:enzymology*; D006434:Hemocytes / Q000201:enzymology; D007700:Kinetics; D008070:Lipopolysaccharides; D008297:Male; D014442:Monophenol Monooxygenase / Q000097:blood*; D015054:Zymosan / Q000494:pharmacology
D004792:Enzyme Precursors; D005227:Fatty Acids; D008070:Lipopolysaccharides; D015054:Zymosan; D014442:Monophenol Monooxygenase; D000581:Amidohydrolases