Table 2.

The KxL motif is required for frs function

Genotype of male	Normal ventral furrow	Open ventral furrow	Penetrance*(%)
Df frs/TM3	100	78	88
frs+; Df frs/TM3	120	20	28
frs86ASA; Df frs/TM3	59	53	94
frs11AxxA; Df frs/TM3	121	19	27
frs22A48A; Df frs/TM3	55	25	62

^*As 50% of the embryos were marked with the reporter gene in a cross with compound females, only 50% of the unmarked embryos that were scored have the expected genotype; the penetrance number takes this into account; Df, deficiency chromosome; Frs, Frühstart; TM, third multiple 3 balancer chromosome.