Biochemical Studies of Tick Embryogenesis. Free Amino Acid Pools During Embryogenesis of Dermacentor andersoni.

摘要

(1) During embryogenesis of the tick Dermacentor andersoni, amino acid concentrations could be separated into 3 groups. In (a) there was slight increase on day 4 of embryogenesis followed by a sharp drop on days 8 and 12 and increase in newly-hatched larvae (day 16) (glutamic acid, aspartic acid, threonine, serine, tyrosine, phenylalanine, histidine, and methionine). In (b) there was a sharp drop on days 4 and 8 and increase in larvae (alanine, proline, and leucine). In (c) there was a slight increase on day 4 followed by a continuous decrease (valine, glycine + isoleucine. and lysine) (2) Total amino acid concentrations decreased during embryogenesis. No change was observed in total proteins. (3) Glutamate-pyruvate transaminase (GPT) activity significantly increased during embryogenesis but glutamate-oxalacetate transaminase (GOT) activity did not change. (Author)