AtT-20 cells expressing the wild-type kappa opioid receptor (KOR) increased phospho-p38
MAPK following treatment with the kappa agonist U50,488. The increase was blocked by the …

Research into population declines of North American bird species has mainly focused on
the fragmentation of habitat on the breeding or wintering grounds [Robinson, SK, Thompson, …

There is ongoing debate about the role of G protein–coupled receptor kinases (GRKs) in
agonist-induced desensitization of the μ-opioid receptor (MOPr) in brain neurons. In the present …

In this study we investigated the mechanisms responsible for MAP kinase ERK1/2 activation
following agonist activation of endogenous mu opioid receptors (MOR) normally expressed …

The ventrolateral periaqueductal gray (vlPAG) is a key structure in the descending pain
modulatory circuit. Activation of the circuit occurs via disinhibition of GABAergic inputs onto …

We studied the effects of habitat fragmentation on four species of North American tanagers (
Piranga spp.) at 1107 study sites in 1995. Volunteer researchers used the standardized …

Populations of formerly continuously distributed species subdivided by habitat fragmentation
may show distributions in space and time that are consistent with predictions of …

The North American pawpaw [ Asimina triloba (L.) Dunal] is a tree fruit in the early stages of
commercial production in the United States. This plant contains annonaceous acetogenins in …

Receptor desensitization by G-protein receptor kinases (GRK) and arrestins is likely to be
an important component underlying the development of tolerance to opioid drugs. …

40 noninsomniacs and 40 sleep-onset insomniacs were differentiated by gender, severity,
and chronicity and were compared with noninsomniacs on MMPI personality characteristics. …