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Table 4 Signal ratios of SNPs are biased towards the interaction type (strong or weak) of the bases present in the probe and sample alleles.

From: Evaluation of a microarray-hybridization based method applicable for discovery of single nucleotide polymorphisms (SNPs) in the Pseudomonas aeruginosa genome

PAO1 allele (probe)a PA14 allele (sample)a abundance median signal ratio sensitivityb
W S 15364 -0.53 52.1%
W W 657 -0.46 47.5%
S S 2592 -0.38 43.7%
S W 12972 -0.30 39.1%
Σ 31585 -0.43 45.9%
  1. a W – IUPAC format for bases with weak interaction (A, T), S – strong interaction (G, C).
  2. b determined for D th = -0.5.