| Expression states |
---|
 | Non-ASE | ASEi/xi | ASEΔ |
---|
Allele | 1 | 2 | 3 | 4 | 5 |
---|
A | On | Off | On | Off | Δ |
a | On | Off | Off | On | Δ |
- Expression states 1 and 2 refer to alleles that do not display allele-specific expression (ASE). Expression states 3 and 4 refer to alleles that do display ASE, for example, due to imprinting (ASEi) and X-inactivation (ASExi). Expression state 5 refers to alleles that display differential ASE (ASEΔ), due to currently unknown mechanism(s).