We present a study of the population of bright early-type dwarf galaxies in the multiple-cluster system Abell 901/902 .
We use data from the STAGES survey and COMBO–17 to investigate the relation between the color and structural properties of the dwarfs and their location in the cluster .
The definition of the dwarf sample is based on the central surface brightness and includes galaxies in the luminosity range -16 \geq M _ { B } \ga - 19 mag .
Using a fit to the color magnitude relation of the dwarfs , our sample is divided into a red and blue subsample .
We find a color-density relation in the projected radial distribution of the dwarf sample : at the same luminosity dwarfs with redder colors are located closer to the cluster centers than their bluer counterparts .
Furthermore , the redder dwarfs are on average more compact and rounder than the bluer dwarfs .
These findings are consistent with theoretical expectations assuming that bright early-type dwarfs are the remnants of transformed late-type disk galaxies involving processes such as ram pressure stripping and galaxy harassment .
This indicates that a considerable fraction of dwarf elliptical galaxies in clusters are the results of transformation processes related to interactions with their host cluster .