The theory of bioelectric code is a remarkable achievement for life sciences. It is unknown whether this theory could apply to mammals. In the present study, sika deer(Cervus nippon) antlers were used as a model to investigate if morphogenesis of mammalian organs was also related to bioelectricity. Deer antlers are complex mammalian organs. Morphogenetic primordia of deer antlers is antlerogenic periosteum(AP). Deer antler morphogenesis can be altered artificially by manipulating AP conveniently. Ten pieces...