FIG. 7.

Type A and type B′ transcripts cycle in fly heads. (A) RNase protection assays were performed with probe 3 on total RNA samples from CS fly heads collected during LD cycles at the indicated time points. The protected type A, type B′, and RP49 bands are as described for Fig. 5A. (B) Quantitation of the data in panel A. Relative RNA abundance refers to the ratio of per to RP49, where the peak value of type A mRNA was adjusted to 1.0. The white and black boxes represent times when lights were on and off, respectively. This experiment was done in three independent time courses with similar results.