These sialyloligo-macroligand derived glycoarray and SPR-based glyco-biosensor are closely to mimic 3D nature presentation of sialyloligosaccharides and will provide important high-throughput tools for virus diagnosis and potential antiviral drug candidates screening applications.”
“TRPC1 is a major component of store-operated

calcium entry in many cell types. In our previous studies, three types of endogenous store-operated calcium channels have been described in HEK293 cells, but it remained unknown which of these channels are composed LY2157299 of TRPC1 proteins. Here, this issue has been addressed by performing single-channel analysis in HEK293 cells transfected with anti-TRPC1 siRNA (siTPRC1) or a TPRC1-encoding plasmid. The results show that thapsigargin-or agonist-induced calcium influx is significantly attenuated in siTRPC1-transfected HEK293 cells. TRPC1 knockdown by siRNA results in the disappearance of store-operated I-max channels, while the properties of I-min and I-NS channels are unaffected. In HEK293 cells with

overexpressed TRPC1 protein, the unitary current-voltage relationship of exogenous TRPC1 channels is almost linear, with a slope conductance of about 17 pS. The extrapolated reversal potential of expressed TRPC1 channels is +30 mV. Therefore, the main electrophysiological and regulatory properties of expressed TRPC1 and native I-max channels are identical. Moreover, selleck screening library TRPC1 overexpression in HEK293 cells results in an increased number of store-operated I-max channels. All these data allow us to conclude that TRPC1 protein forms native store-operated I-max Apoptosis inhibitor channels but is not an essential subunit for other store-operated channel types in HEK293 cells. (C) 2012 Elsevier Masson

SAS. All rights reserved.”
“We have studied the optical recombination channels of TbCl3 using x-ray excited optical luminescence at the N-4,N-5 absorption edge of Tb (giant resonance) in both the energy and time domain. The luminescence exhibits a relatively fast D-5(3), and a slow D-5(4) decay channel in the blue and green, respectively. The rather short lifetime of the D-5(3) state indicates that the decay is mainly driven by Tb-Tb ion interaction via non-radiative energy transfer (cross-relaxation). At the giant resonance the X-ray Absorption Near Edge Structure (XANES) recorded using partial photoluminescence yield is inverted. In the pre-edge region the contrast of the spectral feature is significantly better in optical XANES than in total electron yield. Changes in the intensity of D-5(3)-F-7(5) (544 nm) and D-5(4)-F-7(6) (382 nm) optical transitions as the excitation energy is tuned across the giant resonance are also noted.