Can I use Fluo-4, Pentapotassium Salt, cell impermeant (Cat. No. F14200) in low pH conditions (pH 4-5)?
No. pH affects the ability of Fluo-4, Pentapotassium Salt, cell impermeant (Cat. No. F14200) to bind calcium and the fluorescence intensity. The Fluo-4 dye drops in fluorescence below pH 5.
A component of excitation-contraction coupling triggered in the absence of the T671-L690 and L720-Q765 regions of the II-III loop of the dihydropyridine receptor alpha(1s) pore subunit.
Authors:Ahern CA, Bhattacharya D, Mortenson L, Coronado R
Journal:Biophys J
PubMed ID:11720993
'We conducted a deletion analysis of two regions identified in the II-III loop of alpha(1S), residues 671-690, which were shown to bind to ryanodine receptor type 1 (RyR1) and stimulate RyR1 channels in vitro, and residues 720-765 or the narrower 724-743 region, which confer excitation-contraction (EC) coupling function to chimeric ... More
Initiation and propagation of regenerative Ca(2+)-dependent potentials in dendrites of layer 5 pyramidal neurons.
Authors:Oakley JC, Schwindt PC, Crill WE
Journal:J Neurophysiol
PubMed ID:11431528
'The initiation and propagation of dendritic Ca(2+)-dependent regenerative potentials (CDRPs) were investigated by imaging the Ca(2+)-sensitive dye Fluo-4 during whole cell recording from the soma of layer 5 pyramidal neurons visualized in a slice preparation of rat neocortex by the use of infrared-differential interference contrast microscopy. CDRPs were evoked by ... More
Integration of multianalyte sensing functions on a capillary-assembled microchip: simultaneous determination of ion concentrations and enzymatic activities by a "drop-and-sip" technique.
Authors:Henares TG, Takaishi M, Yoshida N, Terabe S, Mizutani F, Sekizawa R, Hisamoto H
Journal:Anal Chem
PubMed ID:17263315
'A general and simple implementation of simultaneous multiparametric sensing in a single microchip is presented by using a capillary-assembled microchip (CAs-CHIP) integrated with the plural different reagent-release capillaries (RRCs), acting as various biochemical sensors. A novel "drop-and-sip" technique of fluid handling is performed with a microliter droplet of a model ... More
NAADP controls cross-talk between distinct Ca2+ stores in the heart.
Authors:Macgregor A, Yamasaki M, Rakovic S, Sanders L, Parkesh R, Churchill GC, Galione A, Terrar DA
Journal:J Biol Chem
PubMed ID:17387177
'In cardiac muscle the sarcoplasmic reticulum (SR) plays a key role in the control of contraction, releasing Ca(2+) in response to Ca(2+) influx across the sarcolemma via voltage-gated Ca(2+) channels. Here we report evidence for an additional distinct Ca(2+) store and for actions of nicotinic acid adenine dinucleotide phosphate (NAADP) ... More
Long-term potentiation of exogenous glutamate responses at single dendritic spines.
Authors:Bagal AA, Kao JP, Tang CM, Thompson SM
Journal:Proc Natl Acad Sci U S A
PubMed ID:16186507
'Long-term increases in the strength of excitatory transmission at Schaffer collateral-CA1 cell synapses of the hippocampus require the insertion of new alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate receptors (AMPARs) into the synapse, but the kinetics of this process are not well established. Using microphotolysis of caged glutamate to activate receptors at single dendritic spines in ... More