...′′ fate when micromere c′′ is killed suggests that micromeres b′′ and c′′ constitute an equivalence group, in which giving rise to the normal c′′ clone is the primary fate, and in which the secondary fate is cell death. By contrast, we found no combination of ablations that was able to rescue the b...

... to the nervous system and epidermis of the mature leech. It has been thought that the fate-determining interactions in this ‘O-P equivalence group’ take place between the equipotent cells themselves. We show here that such intra-group interactions are neither necessary nor sufficient. Instead, transient contact...

... cell fate decision in a vertebrate. 10 August 1995 © 1995 by Company of Biologists 1995 retina ganglion cells Notch equivalence group vertebrate A working model for cell fate acquisition in vertebrate retinal development can be suggested based on these and related data...