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Effect of age on acetylcholinesterase and other hemolymph proteins in Aplysia by Malathi Srivatsan; Bertram Peretz; Brent Hallahan; Ramesh Talwalker is a Environmental Science article available to read on EtoBox.

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Hemolymph was examined in young (ca. 86 days old), mature (ca. 163 days old), and old (ca. 294 days old) Aplysia for age-related changes in constituent proteins. In young, mature, and old animals protein concentrations were 1.6 +/- 0.27, 1.41 +/- 0.53, and 1.45 +/- 0.43 mg.ml-1, respectively. The copper-containing respiratory protein, hemocyanin, measured by determining the copper concentration, was found to increase significantly from young (0.98 +/- 0.51 microgram.ml-1) to mature (2.02 +/- 0.95 micrograms.ml-1) Aplysia, with little change between mature and old (1.92 +/- 0.43 micrograms.ml-1) animals. These findings were consistent with the results obtained when hemocyanin was directly measured by spectrophotometric absorption at 340 nm. Acetylcholinesterase (AChE) was present in the hemolymph of Aplysia. Its activity was highest in mature animals (3121 +/- 1627 units.mg-1) and least in old animals (1463 +/- 599 units.mg-1). Young animals had intermediate levels (2080 +/- 762 units.mg-1). SDS-PAGE revealed a distinct pattern of protein bands for hemolymph from each age group; hemolymph from the young group contained six prominent protein bands with molecular weights (MW) from 13

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Author

Malathi Srivatsan; Bertram Peretz; Brent Hallahan; Ramesh Talwalker

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC (ISSN 0174-1578)

Published

1992

Language

EN

Field

Environmental Science (Life Sciences)