Table 2. Comparison of our annotation vs. the FlyBase annotation r2.23.
| Genes | FlyBase r2.23 | Our annotation |
| Total number of genes | 16074 | 16743 |
| Total number of genes + strand | 8009 | 8325 |
| Total number of genes – strand | 8065 | 8357 |
| Total number of genes no strand | 0 | 61 |
| Mean gene length (bp) | 3538.30 | 4554.39 |
| Gene density gene/Mb | 105.24 | 109.62 |
| Number of transcripts | 16619 | 23605 |
| Average isoforms per gene1 | 1.03 | 1.41 |
| Percent of transcripts with introns | 75.89 | 81.41 |
| Mean transcript length | 1484.66 | 2175.79 |
| Exons 2 | FlyBase r2.23 | Our annotation |
| Number | 57535 | 59213 |
| Mean number per transcript | 3.58 | 3.54 |
| GC content | 53.54 | 51.82 |
| Mean length (bp) | 406.63 | 566.04 |
| Total length (bp) | 23395488 | 33517186 |
| Introns 2 | FlyBase r2.23 | Our annotation |
| Number | 41461 | 42470 |
| Mean number per transcript | 3.44 | 3.44 |
| GC content | 41.85 | 41.57 |
| Mean length (bp) | 797.30 | 897.53 |
| Total length (bp) | 33056749 | 38118309 |
| UTRs3 | FlyBase r2.23 | Our annotation |
| Number of genes having UTR | 577 | 7066 |
| Mean UTR length (bp) | 215.09 | 769.57 |
| Number of 5′UTRs | 445 | 6695 |
| Mean 5′UTR length (bp) | 149.76 | 498.49 |
| Number of 3′UTRs | 493 | 6619 |
| Mean 3′UTR length (bp) | 274.06 | 1043.77 |
1only considering multiple exon genes,
2only for the longest isoforms of each gene.