93 research outputs found
Scoring Federal Legislation for Equity: Definition, Framework, and Potential Application
Federal legislation is fundamental to building a nation in which all can participate, prosper, and reach their full potential. Since our nation's founding, in many ways, federal legislation has created and exacerbated racial inequities, leaving one-third of the population experiencing material poverty and preventing our democracy from realizing the promise of equity. To ensure the federal government serves us all, we must accurately understand and assess whether every policy advances or impedes equity. The Equity Scoring Initiative (ESI) exists to establish the foundation for a new legislative scoring regime. By scoring for equity, we can begin to create an accountable, responsive democracy
Binding of an RNA trafficking response element to heterogeneous nuclear ribonucleoproteins A1 and A2
Heterogeneous nuclear ribonucleoprotein (hnRNP) A2 binds a 21-nucleotide myelin basic protein mRNA response element, the A2RE, and A2RE-like sequences in other localized mRNAs, and is a trans-acting factor in oligodendrocyte cytoplasmic RNA trafficking. Recombinant human hnRNPs A1 and A2 were used in a biosensor to explore interactions with A2RE and the cognate oligodeoxyribonucleotide. Both proteins have a single site that bound oligonucleotides with markedly different sequences but did not bind in the presence of heparin. Both also possess a second, specific site that bound only A2RE and was unaffected by heparin, hnRNP A2 bound A2RE in the latter site with a K-d near 50 nM, whereas the K-d for hnRNP A1 was above 10 muM. UV cross-linking assays led to a similar conclusion. Mutant A2RE sequences, that in earlier qualitative studies appeared not to bind hnRNP A2 or support RNA trafficking in oligodendrocytes, had dissociation constants above 5 muM for this protein. The two concatenated RNA recognition motifs (RRMs), but not the individual RRMs, mimicked the binding behavior of hnRNP A2. These data highlight the specificity of the interaction of A2RE with these hnRNPs and suggest that the sequence-specific A2RE-binding site on hnRNP A2 is formed by both RRMs acting in cis
Recommended from our members
A comparison of the health status of freshmen at Oregon State University from 1930 to 1960
The data gathered for the study of the health status of freshmen
at Oregon State University were derived by an analysis of health history
records. These were obtained from the Oregon State University
Health Service. The years sampled were 1930, 1940, 1950 and 1960;
300 freshman male and 300 freshman female names were chosen at
random for each sample year, giving a total of 2400 students studied.
The data for each sex were computed separately.
Final statistical evaluation was based on range, mean, and standard
deviation of the data gained. This gave an average image of the
female and male freshman students for each year studied.
Included in the study were certain data pertaining to the health
status of the student's parents and relatives. Findings
The
following
findings
were
found
in
an
analysis
of
the
data gathered
in
the
research.
1.
Both
female
and
male
freshmen
show
a gain
in
height
and
weight
with
each
succeeding
year
sampled.
The
greatest
mean
height
was
in
1950
and
the
greatest
mean
weight
was
in
1960.
2.
While
there
was
a
leveling
off
or
decrease
in
the
incidence
of
communicable
diseases,
essentially
the
severe
ones,
there
appeared
an
increase
in
non-communicable
diseases.
3.
Mothers
and
fathers
of
freshman
students
are
getting
younger.
While
there
is
still
some
difference
in
age,
the
father's
mean
age
is
approaching
that
of
the
mother's.
4.
Data
on
relatives
show
a
decrease
in
reported
cases
of
tuberculosis.
Heart
disease,
cancer
and
diabetes
all
increased
greatly,
with
diabetes
showing
the
greatest
percentage
of
increase.
Conclusions
1.
Freshmen
at
Oregon
State
University
are
gaining
in
stature
and
future
generations
will
probably
be
heavier
and
possibly
taller.
2.
Freshmen
at
Oregon
State
University
are
healthier
in
the
sense
that
they
have
a
lower
case
incidence
of
the
communicable,
more
common
severe
diseases.
However,
their
chances
of
developing
non-communicable
diseases
are
increasing.
3.
The
parents
of
Oregon
State
University
freshmen
are
successively
younger
with
each
decade. 4.
If
the
trend
indicated
in
the
study
continues
relatives
of
freshmen
at
Oregon
State
University
will
experience
an
increase
in
the
incidence
of
organic
diseases.
Recommendations
Criteria
for
health
status
should
be
established
and
health
record
cards
should
be
designed
to
reflect
these
criteria.
Other
studies
should
be
initiated
to
provide
comparisons
with
this
study.
In
this
way
up-to-date norms
can
be
established
for
local,
regional
and
national
utilization
cAMP-dependent regulation of IKs single-channel kinetics
International audienceThe delayed potassium rectifier current, IKs, is composed of KCNQ1 and KCNE1 subunits and plays an important role in cardiac action potential repolarization. During β-adrenergic stimulation, 3′-5′-cyclic adenosine monophosphate (cAMP)-dependent protein kinase A (PKA) phosphorylates KCNQ1, producing an increase in IKs current and a shortening of the action potential. Here, using cell-attached macropatches and single-channel recordings, we investigate the microscopic mechanisms underlying the cAMP-dependent increase in IKs current. A membrane-permeable cAMP analog, 8-(4-chlorophenylthio)-cAMP (8-CPT-cAMP), causes a marked leftward shift of the conductance–voltage relation in macropatches, with or without an increase in current size. Single channels exhibit fewer silent sweeps, reduced first latency to opening (control, 1.61 ± 0.13 s; cAMP, 1.06 ± 0.11 s), and increased higher-subconductance-level occupancy in the presence of cAMP. The E160R/R237E and S209F KCNQ1 mutants, which show fixed and enhanced voltage sensor activation, respectively, largely abolish the effect of cAMP. The phosphomimetic KCNQ1 mutations, S27D and S27D/S92D, are much less and not at all responsive, respectively, to the effects of PKA phosphorylation (first latency of S27D + KCNE1 channels: control, 1.81 ± 0.1 s; 8-CPT-cAMP, 1.44 ± 0.1 s, P < 0.05; latency of S27D/S92D + KCNE1: control, 1.62 ± 0.1 s; cAMP, 1.43 ± 0.1 s, nonsignificant). Using total internal reflection fluorescence microscopy, we find no overall increase in surface expression of the channel during exposure to 8-CPT-cAMP. Our data suggest that the cAMP-dependent increase in IKs current is caused by an increase in the likelihood of channel opening, combined with faster openings and greater occupancy of higher subconductance levels, and is mediated by enhanced voltage sensor activation
- …