Since July 1995, the European Bioinformatics Institute (EBI) has maint
ained RHdb, a public database for radiation hybrid data. Radiation hyb
rid data are used in the generation of alternative genetic maps as the
y can include non-polymorphic markers and are also powerful enough to
order unresolved genetic clusters of polymorphic STSs. The EBI is an O
utstation of the European Molecular Biology Laboratory (EMBL).