Figure 3

Flow chart of the filtering steps and quadratic regression analysis on the olfactory receptor neuron data. Our regression method is applied to the olfactory receptor neuron data. At first, Affymetrix quality controls, expressed sequence tags, and genes which have "A" calls across all chips were removed from the analysis. Nine regression patterns were identified among 3834 remaining genes (colored in red). FLAT stands for no statistically significant differential expression over time detected by the regression method; LU stands for linear up regulated regression pattern; LD stands for linear down regulated regression pattern; QC stands for quadratic concave regulated regression pattern; QV stands for quadratic convex regulated regression pattern; QLCU stands for quadratic linear concave up regulated regression pattern; QLCD stands for quadratic linear concave down regulated regression pattern; QLVU stands for quadratic linear convex up regulated regression pattern; QLVD stands for quadratic linear convex down regulated regression pattern.