The pixel intensity of positive hybridization was then normalized relative to a mean hybridization signal observed from the set of positive control (PC) probes to provide the best array-to-array consistency, because PC probes were universal for every hybridized PCR amplicon (Liles et al. 2010).
Due to considerable photobleaching of NBD-PC probe the FMS images were taken in 5 nm steps, so that fewer exposures were needed to obtain the whole spectrum.
Consequently, any fusion of the OPP liposomes with different amount of cholesterol relative to the cancer cell membrane should lead to a change in the lipid environment of the NBD-PC probe.
We find that in a DOPC bilayer the conformational ordering of lipids around di-pyrenyl-PC probes is altered to a largely similar extent regardless of where the pyrene moiety is attached to the hydrocarbon chain.
OPP liposomes were labeled with the environment-sensitive NBD-PC fluorescent probe.
For fluorescence acquisition of dsDNA-specific PCs the probes were incubated with dsDNA-dig followed by anti-dig-A594 and for total PCs with anti-IgG and IgM-bio (SouthernBiotech) followed by streptavidin-FITC (BD Biosciences).
To perform the hybridization process, we performed hybridization experiments on a chemically modified chip using target molecules NC and PC to the probe ones.
A field emission scanning electron microscope (model: MV2300, CamScan, Czech and England) and an atomic force microscope (AFM; Auto Probe PC, Park Scientific Instrument, Santa Clara, CA, USA) were also employed for investigation of chemical composition and surface morphology of the samples, respectively.
The surface roughness and physical morphology are investigated by means of AFM (Auto Probe Pc, Park Scientific Instrument, USA; in contact mode, with low-stress silicon nitride tip of less than 200 Å radius and tip opening of 18°) analysis and scanning electron microscope (SEM: LEO 440i, England).
Morphological properties of deposited samples were investigated by scanning electron microscopy (SEM, Hitachi S-4160) atomicomic force microscopy (AFM, Auto Probe Pc; in contact mode, with low stress silicon nitride tip of less than 200 Ao radius and tip opening of 18o) analysis.
All vials were placed in a shaker for 10 min, subsequent to which the conductivity of each vial was determined using a bench top conductivity probe (PC 700; Oakton, Vernon Hills, IL, USA).
