Each peptide solution is pumped back and forth along a defined spotting area of the chip for one hour.
The irregular distributions of the pixels contributing to the signal of one of the artificial glomeruli, which then serves the purpose of a well defined spot, i.e. the summary of pixels with similar properties, resemble much better the zonal- and distributed nature of ORNs in the olfactory epithelium.
It was thought that variables such as these might affect spot quality (i.e. size and density) and so lead to differences in spot number when software settings are such that they discriminate between a large fuzzy spot and a small well defined spot.
After visual inspection, one spot from the FTC PTC model (spot number 0401, data not shown) was excluded from the investigation, as this was an elongated, vaguely defined spot very close to the precipitation line at the acidic edge of the 2-DE gel, rendering any further analysis unreliable.
Deposition of the cell also required careful control over fluid volumes, and the time cost to accurately deposit the cell on the defined spot with the PID control scheme was ∼9 seconds.
Figure 4 illustrates in a very direct way why our approach is more biomimicking than just using well defined spots of a number of given color indicators.
For example, clouded leopards, a critically endangered species with less defined spots, pair up with their mates early in life.
Overexpression of wild-type VPS33B and VIPAR within HEK293 cells has found that these two proteins strongly colocalize to defined spots, and that these partially colocalize with RAB11A, a marker for recycling endosomes [Cullinane et al., 2010].
Well defined spots were obtained when the chamber was saturated with the mobile phase for 10 min at room temperature.
Two more antigens were detected with the sera of more than one patient but could not be assigned to defined spots in the silver-stained gels.
