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Fig. 5. Pathway preference in rblA-null cells. (A-C)
rblA-null cells were stained with Cell Tracker CMFDA and mixed with
excess wild-type cells (proportions 20:80) and allowed to develop. The stained
cells predominate in the stalk (A) and the basal disk (B). In the spore head
(C), they are found in the upper cup (top); a few form spores (bottom).
(D) RblA-null cells transformed with
actin6::-ß-galactosidase reporter were mixed with wild-type cells in the
same proportion; at the slug stage, the marked cells predominantly occupy the
prestalk zone (left) and the rearguard zone (right).