Expressed sequence tags (ESTs) were produced for normalized cDNA libraries prepared from several tissues of 2 marine crustaceans, the green shore crab Carcinus maenas and the American lobster Homarus americanus. Tissues represented in the Carcinus library were anterior and posterior gills, hypodermis, heart, hepatopancreas, antennal gland, brain, testis, and skeletal muscle, obtained from anima...

The daily rhythm of PERIOD protein (PER) expression is an integral component of the circadian clock, which is found among a broad range of animal species including fruit flies, marine mollusks and even humans. The use of antibodies directed against PER has provided a helpful tool in the discovery of PER homologues and the labeling of putative pacemaker cells, especially in animals for which an ...

Biochemical and pharmacological studies have established that crustacean nervous system contains fairly large amounts of cholinesterase and acetylcholine or acetylcholine-like compounds (Nachmansohn and Rothenburg, '45; Schallek, '45; Augustinsson, '48; Walop, '50, '51; Walop and Boot, '50). The ability of lobster central ganglia to hydrolyze acetylcholine, and the effectiveness of extracts of ...