Scatterplot of muscle vs. oligo(dT) hybridization results. This is a scatterplot of the magnitude of hybridizations in the array membrane shown in Fig. 1, with each point indicating the intensities of a spot's hybridization with a first strand cDNA probe made from muscle mRNA, as well as an end-labeled Oligo(dT) probe used to measure PolyA. The intensities are given in phosphorimager units. Spots with Muscle values greater than 24000 and polyA values greater than 12000 are outliers that may be due to the formation of hybridization heteropolymers.