Table 1. Circadian rhythmicity of Alk and Nf1 mutants.

Genotype	18°C*			29°C*			25°C†
	Period (hr)	FFT	% R (n)	Period (hr)	FFT	% R (n)	Period (hr)	FFT	% R (n)
iso31	23.26±0.19	0.073±0.005	100.0 (16)	23.80±0.04	0.108±0.011	100.0 (16)	23.41±0.06	0.051±0.005	100.0(16)
Alk ts	23.70±0.25	0.064±0.008	93.3 (15)	23.79±0.04	0.087±0.011	100.0 (15)	23.60±0.06	0.052±0.007	100.0(15)
Alk ts/1	23.45±0.14	0.063±0.010	86.7 (15)	23.90±0.01	0.124±0.010	100.0 (15)			‡
Alk ts/Def	23.26±0.24	0.077±0.011	100.0 (9)	23.77±0.04	0.124±0.011	100.0 (9)			‡
Nf1 P1/P2			0 (16)			0 (16)			0 (24)
Alk ts/1 ;Nf1 P1/P2			0 (11)			0 (11)			0 (23)

*Flies were raised and entrained at 18. Their activities were monitored in DD at 18°C for 4 days and at 29°C for another 4 days.

^†Flies were raised and tested at 25°C.

^‡ Alk ^ts/1 and Alk ^ts/Def flies are not viable when raised at 25°C.