From: After 'completion': the changing face of human chromosomes 21 and 22
Gene category | Chromosome 21 | Chromosome 22 | ||
---|---|---|---|---|
 | May 2000 [2] | February 2004 [16] | December 1999 [1] | January 2003 [13] |
Known | 127 | 241 | 247 | 393 |
Novel coding sequences | 13 | 1 | 150 | 153 |
Novel transcripts | 17 | 25 | 0 | 0 |
Putative | 68 | 17 | 148 | 31 |
Total non-pseudogenes | 225 | 284 | 545 | 577 |
Pseudogenes | 59 | 98 | 134 | 234 |
Total | 284 | 382 | 679 | 811 |
Immunoglobulin segments (all types)* | Â | Â | Â | 125 |
Grand total | Â | Â | Â | 936 |