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If stably expressed in human embryonic kidney (HEK)293 cells, the human Mel(1a)-melatonin receptor activates G(i)-dependent, pertussis toxin-sensitive signaling pathways, i.e., inhibition of adenylyl cyclase and stimulation of phospholipase Cbeta; the latter on condition that G(q) is coactivated. The antagonist luzindole blocks the effects of melatonin and(More)
Mel 1a melatonin receptors belong to the super-family of guanine nucleotide-binding regulatory protein (G protein)-coupled receptors. So far, interest in Mel 1a receptor signaling has focused mainly on the modulation of the adenylyl cyclase pathway via pertussis toxin (PTX)-sensitive G proteins. To further investigate signaling of the human Mel 1a receptor,(More)
BACKGROUND Huanglongbing (HLB) or citrus greening is a bacterial disease vectored by the Asian citrus psyllid (ACP) causing tree decline, and yield loss. Vector control and foliar nutrition are used in Florida to slow the spread of HLB and mitigate debilitating effects of the disease. A four year replicated field study was initiated February 2008 in a(More)
The presence of beef cattle at three stocking rates had no impact on nutrient load (P and N) of surface runoff water when compared with pastures containing no cattle. Rationale Florida ranks third among states east of the Mississippi river and 12 th nationally in total number of beef cows (Florida Agricultural Statistics Service, 2002 Report). In contrast(More)
Reconstitution experiments with purified components reproduce the basic characteristics of receptor/G protein coupling, i.e., GTP-sensitive high affinity agonist binding and receptor-promoted GTP binding. However, the interaction of agonists with the A1 adenosine receptor in rat and bovine but not human brain membranes deviates from the ternary complex(More)
A membrane protein identified in cortical brain membranes and termed 'coupling cofactor', modulates G protein-coupling of the A1-adenosine receptor by reducing the catalytic efficiency of the receptor. Coupling cofactor traps the A1-adenosine receptor in the high affinity complex and, thus, is responsible for the resistance of high affinity A1-agonist(More)
Because farm labor supervisors (FLSs) are responsible for ensuring safe work environments for thousands of workers, providing them with adequate knowledge is critical to preserving worker health. Yet a challenge to offering professional training to FLSs, many of whom are foreign-born and have received different levels of education in the US and abroad, is(More)
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