ScerGAL4GMR84B12 drives expression in pre-migrating SNS cells, and in all three SNS clusters from the start of delamination through the end of embryogenesis; all SNS cells are labeled by the end of embryogenesis. Expression is also driven in the developing embryonic foregut starting at embryonic stage 12.
Embryos derived from mothers carrying Scer\GAL4GMR84B12 produce shorter embryos. No effect is seen when fathers carry Scer\GAL4GMR84B12. A large number of the embryos fail to hatch.