Putative members of the IGN identified in six different studies.

The ten members of the IGN studied in this manuscript are indicated in bold. Check marks (√) indicate positive identification of IGN members by gene expression assays. Absence of expression is not explicitly indicated except in examples from our study, where differential expression was observed by microarray, or Q-RT-PCR failed to detect amplification (−). Variable expression (observed in some but not all cell types) is indicated (+/−).