OBJECTIVES The study was designed to determine if morphine was present in lobster tissues. It was also important to determine, as in other animals, if its levels would change in response to stress. In this regard, it was also important to determine if lobster immune and neural tissues express the mu opiate receptor subtype, which was coupled to constitutive nitric oxide synthase derived nitric ...

-1. Paramyosins isolated from nematode Caenorhabditis elegans, clam Meretrix meretrix and Mercenaria mercenaria, scallop Patinopecten yessoensis, abalone Notohaliotis discus, lobster Homarus vulgaris and sea cucumber Holothuria leucospilata were examined for phosphorylation rate and immunological reactivity against anti-Meretrix ~t-paramyosin antiserum. 2. A high phosphorylation was only observ...

By quantitative sodium dodecyl sulfate-polyacrylamide gel electrophoresis, paramyosin:myosin heavy chain molecular ratios were calculated for three molluscan muscles:Aequipecten striated adductor, Mercenaria opaque adductor, and Mytilus anterior byssus retractor; and four arthropodan muscles:Limulus telson, Homarus slow claw. Balanus scutal depressor, and Lethocerus air tube retractor. These ra...

In this project we invectigated bidirectional propagation of action potentials in giant axon of lobster Homarus americanus. We found an asymetrical propagation in the giant axons from the first two walking legs, which have claws. The backpropagating antidromic action potential decreases the conduction velocity when we increase the stimulation voltage, while the forward propagating (orthodromic)...