The reference spots were visualized with UV (254 and 366 nm).
To quantify the differences in calibration between the reference spots and experimental protein spots on the plate, we applied the derived 'topological map' to afford the best calibration throughout the plate while using a single calibrant.
The mean scattering signals from within a printed spot can be observed by monitoring the recorded absorbance from the reference spots containing only PEG (Fig. 3(c), top).
As we had previously determined which of the 804 reference spots were significantly regulated in either of these two species (see Figure 4), we divided the genomic hybridization results for the reference spots into two classes depending on whether they were also brain-enriched in the other species or not.
p1,p2are the beam profile pixel coordinates; α1and α2are the beam incidence and exit angles with related azimuth angles β and γ. d1,d2are the detector pixel coordinates, and r0= x0), y0, z0) is the reference point of the spot center at the sample surface (a).
Following this procedure, two translational moiré images (we used M = 1) are obtained using g r as the reference position of each (111) spot in the FFT pattern and a Bragg mask that includes the collinear ½(111) spot associated with the ordering arrangement.
Raw microarray signal data were normalized in R (www.r-project.org), using a four step approach [28]: (1) natural log-transformation, (2) quantile normalization of all scans, (3) correcting the sample spot signal for the corresponding reference spot signal and (4) averaging data from replicate probe spots.
Microarray spot signal data were normalized in R using a four-step approach of (1) natural log-transformation, (2) quantile normalization of all scans, (3) correction of the sample spot signal for the corresponding reference spot signal and (4) averaging data from replicate spots.
Raw signal data for oligonucleotide-containing spots were normalized with R software http://www.r-project.org by using a three-step approach [ 5] that consisted of (1) natural log transformation, (2) quantile normalization of all scans, (3) correction of the sample spot signal for the corresponding reference spot signal.
Using the prepared 96-well plates and Biacore A100 SPR system, four peptides were flowed separately, in parallel, through the four flow cells over all 4 TNF-α spots and the neutravidin reference spot (16 TNF-α, 4 neutravidin spots total), with a 60-second association phase and 300-second dissociation phase.
