Table 2. The number of essential genes identified in this study.

Essential Genes Sequenced	Allele Sequenced	Genes Identified	Total Essential Genes Identified
Chromosome III (mid/sDp3): 43 genes	37 genes with single allele sequenced	21 of 37 genes identified	27 of 43 genes
	Six genes with two alleles sequenced	Six of six genes identified
Chromosome V (left/eT1): 46 genes	Six genes with single allele sequenced	Five of six genes identified	35 of 46 genes
	40 genes with two alleles sequenced	30 of 40 genes identified
Total: 89 genes			62 (60 mapped molecularly)