
Cumulated gene counts for MGC, XGC, and ZGC. The progressive addition of clones, measured by genes represented in each collection, is shown for MGC, XGC, and ZGC from the beginning to conclusion of these programs. “Gene Count” is the total final number of RefSeq genes represented by each set of clones. This number includes some noncurated genes (XM accessions) that are not counted in Table 1. “Clone Count” includes all clones, including duplicate transcripts and isoforms. Isoforms constitute 2%–3% of the human, mouse, and rat collections.











