This is an oligonucleotide microarray designed to measure splicing in yeast. Each intron containing gene has 3 features (Splice Junction, Intron, Exon2). The SJ oligo symmetrically spans the splice junction with 20nt on each side. The SJ, Int, and Ex2 oligos are custom designed 40-mers. The array also contains a collection of 40-mers desiigned to detect hypothetical introns predicted by comparative genomics. The array also contains about 1000 70-mers from the Operon Yeast Genome Set. All of the SJ, Int, and Ex2 oligos are printed 4 times, the Operon 70-mers are printed only once. Keywords = Splicing