Expression of ZmSUN genes in meiosis-stage anthers. Relative expression levels shown by maize SUN-domain protein genes obtained from published microarray experiments (Gene Expression Omnibus [73, 79]). The cDNAs were from meiosis-stage anthers 1 mm, 1.5 mm, and 2 mm in length. The histogram depicts signals relative to the whole-chip mean. Dye-normalized values for each channel generated by Feature Extraction software were divided by the median intensity for that channel on each array, and then the log base 2 was taken, as previously described . The table at the bottom tabulates the gene name (Gene), Probe ID (the gene model/contig being targeted), and feature number (chip oligo 60-mer).