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Summary of current microarray platforms to profile DNA methylation.
| Probe Length (bp) | Probe Spacing (bp) | Density | Total probe number | Array number | ||
|---|---|---|---|---|---|---|
| Affymetrix | Promoter | 25 | 35 | 4.60×106 | 4.6 million | 1 |
| Tiling | 25 | 35 | 3.25×106 | Up to 45 million | Up to 14 | |
| Agilent | Promoter | 60 | 100 | 244 ×103 | 237,220 | 1 |
| Tiling | 60 | 100 | 244 ×103 | 14.5 million | Up to 6 | |
| Roche NimbleGen | Promoter | 50-75 | 100 | 385×103 or 2.1×106 | Various | Up to 2 |
| Tiling | 50-75 | 100 | 385×103 or 2.1×106 | Various | Up to 10 |
