FIGURE 2. Defining criteria for identifying SBF and MBF targets.
From the following article:
Genomic binding sites of the yeast cell-cycle transcription factors SBF and MBF
Vishwanath R. Iyer, Christine E. Horak, Charles S. Scafe, David Botstein, Michael Snyder and Patrick O. Brown
Nature 409, 533-538(25 January 2001)
doi:10.1038/35054095
a, Distribution of median percentile ranks of Cy5/Cy3 fluorescence
ratios from 11 independent microarray hybridizations analysing Swi4 binding.
The threshold for defining SBF targets is indicated by a dotted line.
b, Distribution of median ranks of Cy5/Cy3 fluorescence ratios from four
independent microarray hybridizations analysing Swi6 and Mbp1 binding.
c, Fraction of genes in a sliding 50-gene window whose expression profile
has a correlation coefficient of 
0.5 with that of a canonical
G1/S regulated gene, as a function of the median percentile ranks of Cy5/Cy3
fluorescence ratios from the MBF hybridizations. The threshold for defining
MBF targets is indicated by a dotted line.