|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
Free Amino Acids in the Haemocytes and Plasma of the Larva of Calliphora Vicina
1 ARC Unit of Invertebrate Chemistry and Physiology, Department of Zoology, University of Cambridge, Downing Street, Cambridge; Harvard Medical School, Department of Neurobiology, 25 Shattuck Street, Boston, Mass. 02115, U.S.A.
2 ARC Unit of Invertebrate Chemistry and Physiology, Department of Zoology, University of Cambridge, Downing Street, Cambridge; Department of Zoology, University of Sydney, Sydney 2006, Australia
Free amino acid concentrations have been measured in haemolymph samples taken from 3rd instar larvae of the blowfly, Calliphora vicina, at various stages prior to pupariation. The amino acids found in the haemocyte fraction only accounted for 6% of the total free amino acid concentration of the haemolymph. However, a high percentage of the dicarboxylic amino acids, glutamate and aspartate, 62% and 69% respectively, appeared to be sequestered in the haemocyte fraction at 72 h prior to pupariation. The percentage of the other individual amino acids found in the haemocyte fraction represented less than 10% of their amount in whole haemolymph. It is proposed that these results, together with the increase in the haemocyte levels of glutamate observed after injecting larvae with saline containing glutamate, are one of the first indications of a homeostatic function of insect haemocytes with respect to haemolypmh amino acids.
Submitted on May 13, 1974
This article has been cited by other articles:
|
|
 |
|
  M. H. Hazel, J. P. Ianowski, R. J. Christensen, S. H. P. Maddrell, and M. J. O'Donnell Amino acids modulate ion transport and fluid secretion by insect Malpighian tubules J. Exp. Biol., January 1, 2003; 206(1): 79 - 91. [Abstract] [Full Text] [PDF]
|
|
