...Ijeoma E. Obi; Kenneth M. Sterling; Gregory A. Ahearn SUMMARY Transepithelial transport of dietary d -glucose and d -fructose was examined in the lobster Homarus americanus intestine using d -[ 3 H]glucose and d -[ 3 H]fructose. Lobster intestines were mounted in a perfusion chamber to determine...

...K. M. Sterling; B. Roggenbeck; G. A. Ahearn SUMMARY This study describes the membrane transport mechanisms used by lobster ( Homarus americanus ) hepatopancreatic epithelial lysosomes to accumulate and sequester heavy metals from the cytosol, and thereby aid in the regulation of these ions entering...

...) cardioactive peptide diuretic hormone 31 (DH 31 ) expressed sequence tag (EST) heart neurohormone neuromodulator neuropeptide reverse transcriptase polymerase chain reaction (RT-PCR) transcriptomics Homarus americanus In hematophagous insects, and likely sap feeders as well, a rapid, post...

... ubiquitous conservation in decapod crustaceans, the paracrine and/or endocrine roles played by pQDLDHVFLRFamide remain largely unknown. We have examined the actions of this peptide on the cardiac neuromuscular system of the American lobster Homarus americanus using four preparations: the intact animal...

...Jeanette L. Lim; M. Edwin DeMont SUMMARY The American lobster ( Homarus americanus ) displays a diverse set of locomotory behaviours that includes tail flips, walking and paddling. Paddling is carried out by the four pairs of paddle-shaped pleopods on the ventral abdomen. Although it is recognized...

... SYWKQCAFNAVSCFamide (disulfide bridging predicted between the two Cys residues), a known honeybee and water flea C-type-like peptide, from the American lobster Homarus americanus (infraorder Astacidea). Using matrix assisted laser desorption/ionization Fourier transform mass spectrometry (MALDI-FTMS), a mass...

... properties. Clawed lobsters, Homarus americanus H. Milne Edwards 1837, were purchased from a local wholesaler and maintained in a sea water aquarium at 14°C. Prior to dissection, animals were `cold' anesthetized by burial in crushed ice for about 30 min. They were then pithed by crushing...

...Gereon Maurer; Jerrel L. Wilkens; Manfred K. Grieshaber SUMMARY As shown previously, adenosine and the adenine nucleotides cause a rapid increase in heart rate ( f H ) and haemolymph velocity( v HL ) when infused into intact American lobster( Homarus americanus ). Here we compare the effects...

... vesicles (LMV) occurred by a vanadate- and thapsigargin-sensitive ATPase that was stimulated by a transmembrane proton gradient established by a co-localized V-ATPase associated with this organelle. In the present study, hepatopancreatic LMV from the American lobster Homarus americanus were prepared...

...-sulfakinin from the American lobster Homarus americanus . Two sulfakinin-like sequences were identified within the open-reading frame of the cDNA. Based on modifications predicted by peptide modeling programs, and on homology to the known isoforms of sulfakinin, particularly those from shrimp, the mature H...

... for correspondence (e-mail: [email protected] ) 19 1 2006 © The Company of Biologists Limited 2006 2006 inhibition dactyl opener lobster crustacean CI common inhibitor Homarus americanus The dactyl opener muscle of decapod crustaceans has long served as a model system...

...Mary Kate Worden; Christine M. Clark; Mark Conaway; Syed Aman Qadri SUMMARY The lobster Homarus americanus inhabits ocean waters that vary in temperature over a 25°C range, depending on the season and water depth. To investigate whether the lobster heart functions effectively over a wide range...

... production by American lobsters is not known. sound acoustics American lobster Homarus americanus crustacean antenna vibration A variety of crustacean species are known to be soniferous, including:white shrimp, Penaeus setiferus ( Berk, 1998 ); snapping shrimp of the genera Alpheus...

...Meg E. Johnson; Jelle Atema SUMMARY Individual recognition in the lobster Homarus americanus (Milne-Edwards), is based on detection of urine pheromones via chemoreceptors of the lateral antennular flagellum. The specific sensory pathway mediating this recognition is not known. Most...

...Erik M. Conrad; Gregory A. Ahearn SUMMARY The tubular intestine of the American lobster Homarus americanus was isolated in vitro and perfused with a physiological saline whose composition was based on hemolymph ion concentrations and contained variable concentrations of 3 H- l -histidine, 3 H...

...M. Wildt; E. M. Goergen; J. L. Benton; D. C. Sandeman; B. S. Beltz SUMMARY This study examined whether serotonin levels in the brain of the American lobster, Homarus americanus , are under circadian control. Using high-performance liquid chromatography and semi-quantitative immunocytochemical...

... ) 18 5 2004 © The Company of Biologists Limited 2004 2004 skeletal muscle myosin heavy chain actin isoform lobster Crustacea Arthropoda Homarus americanus Skeletal muscles exhibit considerable variability in their physiological properties, with muscle fiber type being...

...George A. Gerencser; Frank Robbins; Jianliang Zhang; Gregory A. Ahearn SUMMARY The transport of [ 14 C]oxalate (Ox 2– ) by epithelial brush-border membrane vesicles (BBMV) of lobster ( Homarus americanus ) hepatopancreas, formed by a magnesium precipitation technique, was stimulated by an outward...

... of the American lobster Homarus americanus . SDS-PAGE and western blotting were used to identify isoform assemblages of myosin heavy chain (MHC), P75, troponin T(TnT) and troponin I (TnI). RT-PCR was used to monitor expression of fast and slow (S 1 ) MHC, P75 and actin in different fiber types, and the MHC...

... © The Company of Biologists Limited 2003 2003 calpain calcium-dependent proteinase muscle atrophy moulting cDNA gene expression mRNA lobster Homarus americanus Crustacea Arthropoda Calpains constitute a large and diverse family of Ca 2+ -dependent cysteine proteinases...